Old Russian measure of length

Old Russian measure of length is a draft programming task. It is not yet considered ready to be promoted as a complete task, for reasons that should be found in its talk page.

The program should make the conversion of the old Russian measures of length in the metric and vice versa.

Is an example of the transformation of several variables that are linearly. The program accepts a single value in the selected unit, and return it in the rest: vershoks, arshins, sazhens, versts, meters, centimeters and kilometers.

МК-61/52

<lang>П7 1 0 0 * П8 1 ВП 5 / П9 ИП7 1 0 6 7 / П0 5 0 0 * ПC 3 * ПA 1 6 * ПB С/П ПB 1 6 / ПA 3 / ПC 5 0 0 / П0 1 0 6 7 / БП 00</lang>

Instruction: l, meters = РX В/О С/П; l, vershoks = БП 3 1 С/П; l, arshins = РX БП 3 5 С/П; l, sazhens = РX БП 3 8 С/П; l, versts = РX БП 4 3 С/П; РX = РB = l, vershoks; РA = l, arshins; РB = l, versts; РC = l, sazhens; Р7 = l, meters; Р8 = l, centimeters; Р9 = l, kilometers.

Example: 100 m = 2249,2971 vershoks = 140,58107 arshins = 46,860366 sazhens = 0,093790712 versts; 3 vershoks = 13,3375 cm; 2 sazhens = 96 vershoks = 6 arshins = 4,268 m; 1 verst = 1,067 km.

C++

<lang cpp>

1. include <iostream>
2. include <iomanip>

//------------------------------------------------------------------------------------------- using namespace std;

//------------------------------------------------------------------------------------------- class ormConverter { public:

   ormConverter() :  AR( 0.7112f ), CE( 0.01f ), DI( 0.0254f ), FU( 0.3048f ), KI( 1000.0f ), LI( 0.00254f ), ME( 1.0f ),

MI( 7467.6f ), PI( 0.1778f ), SA( 2.1336f ), TO( 0.000254f ), VE( 0.04445f ), VR( 1066.8f ) {}

   void convert( char c, float l )
   {

system( "cls" ); cout << endl << l; switch( c ) { case 'A': cout << " Arshin to:"; l *= AR; break; case 'C': cout << " Centimeter to:"; l *= CE; break; case 'D': cout << " Diuym to:"; l *= DI; break; case 'F': cout << " Fut to:"; l *= FU; break; case 'K': cout << " Kilometer to:"; l *= KI; break; case 'L': cout << " Liniya to:"; l *= LI; break; case 'M': cout << " Meter to:"; l *= ME; break; case 'I': cout << " Milia to:"; l *= MI; break; case 'P': cout << " Piad to:"; l *= PI; break; case 'S': cout << " Sazhen to:"; l *= SA; break; case 'T': cout << " Tochka to:"; l *= TO; break; case 'V': cout << " Vershok to:"; l *= VE; break; case 'E': cout << " Versta to:"; l *= VR; }

float ar = l / AR, ce = l / CE, di = l / DI, fu = l / FU, ki = l / KI, li = l / LI, me = l / ME, mi = l / MI, pi = l / PI, sa = l / SA, to = l / TO, ve = l / VE, vr = l / VR; cout << left << endl << "=================" << endl << setw( 12 ) << "Arshin:" << ar << endl << setw( 12 ) << "Centimeter:" << ce << endl << setw( 12 ) << "Diuym:" << di << endl << setw( 12 ) << "Fut:" << fu << endl << setw( 12 ) << "Kilometer:" << ki << endl << setw( 12 ) << "Liniya:" << li << endl << setw( 12 ) << "Meter:" << me << endl << setw( 12 ) << "Milia:" << mi << endl << setw( 12 ) << "Piad:" << pi << endl << setw( 12 ) << "Sazhen:" << sa << endl << setw( 12 ) << "Tochka:" << to << endl << setw( 12 ) << "Vershok:" << ve << endl << setw( 12 ) << "Versta:" << vr << endl << endl << endl;

   }

private:

   const float AR, CE, DI, FU, KI, LI, ME, MI, PI, SA, TO, VE, VR;

}; //------------------------------------------------------------------------------------------- int _tmain(int argc, _TCHAR* argv[]) {

   ormConverter c;
   char s; float l;
   while( true )
   {

cout << "What unit:\n(A)rshin, (C)entimeter, (D)iuym, (F)ut\n(K)ilometer, (L)iniya, (M)eter, m(I)lia, (P)iad\n(S)azhen, (T)ochka, (V)ershok, v(E)rsta, (Q)uit\n"; cin >> s; if( s & 32 ) s ^= 32; if( s == 'Q' ) return 0; cout << "Length (0 to Quit): "; cin >> l; if( l == 0 ) return 0; c.convert( s, l ); system( "pause" ); system( "cls" );

   }
   return 0;

} //------------------------------------------------------------------------------------------- </lang> Output:

1 Milia to:
=================
Arshin:     10500
Centimeter: 746760
Diuym:      294000
Fut:        24500
Kilometer:  7.4676
Liniya:     2.94e+006
Meter:      7467.6
Milia:      1
Piad:       42000
Sazhen:     3500
Tochka:     2.94e+007
Vershok:    168000
Versta:     7

1 Meter to:
=================
Arshin:     1.40607
Centimeter: 100
Diuym:      39.3701
Fut:        3.28084
Kilometer:  0.001
Liniya:     393.701
Meter:      1
Milia:      0.000133912
Piad:       5.6243
Sazhen:     0.468691
Tochka:     3937.01
Vershok:    22.4972
Versta:     0.000937383

D

Translation of: Perl6

<lang d>import std.stdio, std.string, std.algorithm, std.conv;

void main(in string[] args) {

   auto factor = ["arshin":         0.7112,
                  "centimeter":     0.01,
                  "diuym":          0.0254,
                  "fut":            0.3048,
                  "kilometer":  1_000.0,
                  "liniya":         0.00254,
                  "meter":          1.0,
                  "milia":      7_467.6,
                  "piad":           0.1778,
                  "sazhen":         2.1336,
                  "tochka":         0.000254,
                  "vershok":        0.04445,
                  "versta":     1_066.8];

   if (args.length != 3 || !isNumeric(args[1]) || args[2] !in factor)
       return writeln("Please provide args Value and Unit.");

   immutable magnitude = args[1].to!double;
   immutable meters = magnitude * factor[args[2]];
   writefln("%s %s to:\n", args[1], args[2]);
   foreach (immutable key; factor.keys.schwartzSort!(k => factor[k]))
      writefln("%10s: %s", key, meters / factor[key]);

}</lang>

Output:

1 meter to:

    tochka: 3937.01
    liniya: 393.701
centimeter: 100
     diuym: 39.3701
   vershok: 22.4972
      piad: 5.6243
       fut: 3.28084
    arshin: 1.40607
     meter: 1
    sazhen: 0.468691
 kilometer: 0.001
    versta: 0.000937382
     milia: 0.000133911

1 milia to:

    tochka: 2.94e+07
    liniya: 2.94e+06
centimeter: 746760
     diuym: 294000
   vershok: 168000
      piad: 42000
       fut: 24500
    arshin: 10500
     meter: 7467.6
    sazhen: 3500
 kilometer: 7.4676
    versta: 7
     milia: 1

Haskell

<lang Haskell>module Main where

import Text.Printf (printf) import System.Environment (getArgs, getProgName)

tochka = ("tochka" , 0.000254) liniya = ("liniya" , 0.00254) centimeter = ("centimeter", 0.01) diuym = ("diuym" , 0.0254) vershok = ("vershok" , 0.04445) piad = ("piad" , 0.1778) fut = ("fut" , 0.3048) arshin = ("arshin" , 0.7112) meter = ("meter" , 1.0) sazhen = ("sazhen" , 2.1336) kilometer = ("kilometer" , 1000.0) versta = ("versta" , 1066.8) milia = ("milia" , 7467.6)

units :: [(String, Double)] units = [tochka, liniya, centimeter, diuym, vershok, piad, fut, arshin, meter, sazhen, kilometer, versta, milia]

convert :: Double -> Double -> IO () convert num factor = mapM_ (\(unit, fac) -> printf "| %-10s | %-22f|\n" unit (num * factor / fac)) units

main :: IO () main = do

 args <- getArgs
 case args of
   [x,y] | [(num, "")]   <- reads x :: [(Double, String)]
         , (Just factor) <- lookup y units -> convert num factor
   (_) -> do
     name <- getProgName
     printf "Arguments were wrong - please use ./%s <number> <unit>\n" name</lang>

Output:

./ruslen 8 meter

| tochka     | 31496.062992125986    |
| liniya     | 3149.606299212598     |
| centimeter | 800.0                 |
| diuym      | 314.96062992125985    |
| vershok    | 179.97750281214846    |
| piad       | 44.994375703037115    |
| fut        | 26.246719160104984    |
| arshin     | 11.248593925759279    |
| meter      | 8.0                   |
| sazhen     | 3.749531308586427     |
| kilometer  | 0.008                 |
| versta     | 0.0074990626171728535 |
| milia      | 0.0010712946595961218 |

./ruslen 1 arshin

| tochka     | 2800.0000000000005    |
| liniya     | 280.0                 |
| centimeter | 71.12                 |
| diuym      | 28.000000000000004    |
| vershok    | 16.0                  |
| piad       | 4.0                   |
| fut        | 2.3333333333333335    |
| arshin     | 1.0                   |
| meter      | 0.7112                |
| sazhen     | 0.33333333333333337   |
| kilometer  | 0.0007112             |
| versta     | 0.0006666666666666668 |
| milia      | 0.00009523809523809524|

./ruslen 8 notaunit

Arguments were wrong - please use ./ruslen <number> <unit>


./ruslen notanumber meter

Arguments were wrong - please use ./ruslen <number> <unit>

J

Translation of python. <lang J> NB. Use, linux. NB. $ /usr/local/j64-801/bin/jconsole j.ijs 8 meter

UNIT2MULT =: /:~ _ ".&.>@:{:@:]`1:`]}"1<;._2@:(,&':');._2 'arshin:0.7112,centimeter:0.01,diuym:0.0254,fut:0.3048,kilometer:1000.0,liniya:0.00254,meter:1.0,milia:7467.6,piad:0.1778,sazhen:2.1336,tochka:0.000254,vershok:0.04445,versta:1066.8,'

exit 3 : 0 :: 1: a: -.~ _3 {. ARGV

if. 3 ~: # y do. smoutput 'ERROR. Need two arguments - number then units'
else.
 VALUE =: _ ". _2 {:: y
 if. _ = | VALUE do. smoutput 'ERROR. First argument must be a (float) number'
 else.
  UNIT =: {: y
  UNITS =: 0&{"1 UNIT2MULT
  if. UNIT-.@:e.UNITS do. smoutput 'ERROR. Only know the following units: ' , deb , ,&' '&> UNITS
  else.
   smoutput deb(,,&' '&>_2{.y),'to:'
   smoutput UNITS ,. (VALUE * (< 1 ,~ UNITS i. UNIT) {:: UNIT2MULT) %&.> {:"1 UNIT2MULT
  end.
 end.
end.

) </lang>

$ /usr/local/j64-801/bin/jconsole j.ijs 8 meter
8 meter to:
┌──────────┬──────────┐
│arshin    │11.2486   │
├──────────┼──────────┤
│centimeter│800       │
├──────────┼──────────┤
│diuym     │314.961   │
├──────────┼──────────┤
│fut       │26.2467   │
├──────────┼──────────┤
│kilometer │0.008     │
├──────────┼──────────┤
│liniya    │3149.61   │
├──────────┼──────────┤
│meter     │8         │
├──────────┼──────────┤
│milia     │0.00107129│
├──────────┼──────────┤
│piad      │44.9944   │
├──────────┼──────────┤
│sazhen    │3.74953   │
├──────────┼──────────┤
│tochka    │31496.1   │
├──────────┼──────────┤
│vershok   │179.978   │
├──────────┼──────────┤
│versta    │0.00749906│
└──────────┴──────────┘
$ 

Java

<lang java>public class OldRussianMeasures {

   final static String[] keys = {"tochka", "liniya", "centimeter", "diuym",
       "vershok", "piad", "fut", "arshin", "meter", "sazhen", "kilometer",
       "versta", "milia"};

   final static double[] values = {0.000254, 0.00254, 0.01,0.0254,
       0.04445, 0.1778, 0.3048, 0.7112, 1.0, 2.1336, 1000.0,
       1066.8, 7467.6};

   public static void main(String[] a) {
       if (a.length == 2 && a[0].matches("[+-]?\\d*(\\.\\d+)?")) {
           double inputVal = lookup(a[1]);
           if (!Double.isNaN(inputVal)) {
               double magnitude = Double.parseDouble(a[0]);
               double meters = magnitude * inputVal;
               System.out.printf("%s %s to: %n%n", a[0], a[1]);
               for (String k: keys)
                   System.out.printf("%10s: %g%n", k, meters / lookup(k));
               return;
           }
       }
       System.out.println("Please provide a number and unit");

   }

   public static double lookup(String key) {
       for (int i = 0; i < keys.length; i++)
           if (keys[i].equals(key))
               return values[i];
       return Double.NaN;
   }

}</lang>

1 meter to: 

    tochka: 3937,01
    liniya: 393,701
centimeter: 100,000
     diuym: 39,3701
   vershok: 22,4972
      piad: 5,62430
       fut: 3,28084
    arshin: 1,40607
     meter: 1,00000
    sazhen: 0,468691
 kilometer: 0,00100000
    versta: 0,000937383
     milia: 0,000133912

1 milia to: 

    tochka: 2,94000e+07
    liniya: 2,94000e+06
centimeter: 746760
     diuym: 294000
   vershok: 168000
      piad: 42000,0
       fut: 24500,0
    arshin: 10500,0
     meter: 7467,60
    sazhen: 3500,00
 kilometer: 7,46760
    versta: 7,00000
     milia: 1,00000

Perl 6

Fairly straightfoward. Define a hash of conversion factors then apply them. Does some basic error trapping. Makes no attempt to do correct pluralization because I have no idea what the correct plurals are and little interest in researching them. Conversion factors from Wikipedia: Obsolete Russian units of measurement.

<lang perl6>convert(1, 'meter');

say '*' x 40, "\n";

convert(1, 'milia');

sub convert (Real $magnitude, $unit) {

    my %factor = ( 
       tochka     => 0.000254,
       liniya     => 0.00254,
       diuym      => 0.0254,
       vershok    => 0.04445,
       piad       => 0.1778,
       fut        => 0.3048,
       arshin     => 0.7112,
       sazhen     => 2.1336,
       versta     => 1066.8,
       milia      => 7467.6,
       centimeter => 0.01,
       meter      => 1.0,
       kilometer  => 1000.0,
   );

   die "Unknown unit $unit\n" unless %factor.exists($unit.lc);

   my $meters = $magnitude * %factor.delete($unit.lc);

   say "$magnitude $unit to:\n", '_' x 40;

   printf "%10s: %s\n", $_,  $meters / %factor{$_}
     for %factor.keys.sort:{ +%factor{$^_} }

} </lang>

1 meter to:
________________________________________
    tochka: 3937.007874
    liniya: 393.700787
centimeter: 100
     diuym: 39.370079
   vershok: 22.497188
      piad: 5.624297
       fut: 3.280840
    arshin: 1.406074
    sazhen: 0.468691
 kilometer: 0.001
    versta: 0.000937
     milia: 0.000134
****************************************

1 milia to:
________________________________________
    tochka: 29400000
    liniya: 2940000
centimeter: 746760
     diuym: 294000
   vershok: 168000
      piad: 42000
       fut: 24500
    arshin: 10500
     meter: 7467.6
    sazhen: 3500
 kilometer: 7.4676
    versta: 7

Python

Run as:

commandname <value> <unit>

<lang python>from sys import argv

unit2mult = {"arshin": 0.7112, "centimeter": 0.01, "diuym": 0.0254,

            "fut":    0.3048, "kilometer":  1000.0,   "liniya":  0.00254,
            "meter":  1.0,    "milia":      7467.6,   "piad":    0.1778,
            "sazhen": 2.1336, "tochka":     0.000254, "vershok": 0.04445,
            "versta": 1066.8}

if __name__ == '__main__':

   assert len(argv) == 3, 'ERROR. Need two arguments - number then units'
   try:
       value = float(argv[1])
   except:
       print('ERROR. First argument must be a (float) number')
       raise
   unit = argv[2]
   assert unit in unit2mult, ( 'ERROR. Only know the following units: ' 
                               + ' '.join(unit2mult.keys()) )

   print("%g %s to:" % (value, unit))
   for unt, mlt in sorted(unit2mult.items()):
       print('  %10s: %g' % (unt, value * unit2mult[unit] / mlt))</lang>

Output:

1 meter to:
      arshin: 1.40607
  centimeter: 100
       diuym: 39.3701
         fut: 3.28084
   kilometer: 0.001
      liniya: 393.701
       meter: 1
       milia: 0.000133912
        piad: 5.6243
      sazhen: 0.468691
      tochka: 3937.01
     vershok: 22.4972
      versta: 0.000937383

Output:

1 milia to:
      arshin: 10500
  centimeter: 746760
       diuym: 294000
         fut: 24500
   kilometer: 7.4676
      liniya: 2.94e+06
       meter: 7467.6
       milia: 1
        piad: 42000
      sazhen: 3500
      tochka: 2.94e+07
     vershok: 168000
      versta: 7

Output:

When given a wrong number

ERROR. First argument must be a (float) number
Traceback (most recent call last):
  File "C:\Users\Paddy\Google Drive\Code\old_russian_lengths.py", line 18, in <module>
    value = float(argv[1])
ValueError: could not convert string to float: '1xx'

Output:

When given a wrong unit

Traceback (most recent call last):
  File "C:\Users\Paddy\Google Drive\Code\old_russian_lengths.py", line 24, in <module>
    + ' '.join(unit2mult.keys()) )
AssertionError: ERROR. Only know the following units: kilometer tochka versta fut diuym liniya vershok meter arshin piad centimeter sazhen milia

Racket

Follows the Perl solution, produces similar output. <lang racket>

1. lang racket

(define units

 '([tochka        0.000254]
   [liniya        0.00254]
   [diuym         0.0254]
   [vershok       0.04445]
   [piad          0.1778]
   [fut           0.3048]
   [arshin        0.7112]
   [sazhen        2.1336]
   [versta     1066.8]
   [milia      7467.6]
   [centimeter    0.01]
   [meter         1.0]
   [kilometer  1000.0]))

(define (show u)

 (printf "1 ~s to:\n" u)
 (define n (cadr (assq u units)))
 (for ([u2 units] #:unless (eq? u (car u2)))
   (displayln (~a (~a (car u2) #:width 10 #:align 'right) ": "
                  (~r (/ n (cadr u2)) #:precision 4))))
 (newline))

(show 'meter) (show 'milia) </lang>

REXX

Program features:

•   shows all   other   units of measurements when any unit is specified.
•   accepts abbreviations of the length units
•   does rounding so results are more meaningful and recognizable
•   does error checking on the user input
•   added other old Russian units of measurements
•   uses the correct length unit names when not plural
•   columnarized the output   (instead of a horizontal stream).

<lang rexx>/*REXX program converts a metric or old Russian length to various lengths.*/

                             numeric digits 200            /*lots of digits. */
 /*──translation───*/
 /*tip, top        */        vershok  = 22.492971          /*1.75 inch.      */
 /*palm, quarter   */        piad     = vershok    /   4   /*(also) chetvert.*/
 /*yard            */        arshin   = vershok    /  16
 /*fathom          */        sazhen   = arshin     /   3
 /*turn (of a plow)*/        verst    = sazhen     / 500   /*(also) a versta.*/
 /*mile            */        milia    = verst      /   1.5
 /*inch            */        diuym    = arshin     *  28
 /*foot            */        fut      = diuym      /  12   /*sounds like foot*/
 /*line            */        liniya   = diuym      *  10
 /*point           */        tochka   = diuym      * 100

KM=1000; CM=100 /*define a couple of metric multipliers*/ parse arg N what _ __ /*obtain the user's input from the C.L.*/ if N== then call err 'no arguments specified.' if \datatype(N,'N') then call err 'units not numeric: ' N if _\== then call err 'too many arguments specified: ' _ __ n=n/1 /*normalize it (004──►4 7.──►7, etc.*/ if what== then what='meters' /*None specified? Then assume meters. */ whatU=what; upper whatU /*an uppercase version for ABBREV bif. */ sw=linesize()-1 /*get the linesize (screen width) - 1.*/

                  select              /* [↓]  convert the length ───► meters.*/
                  when abbrev('METRES'     , whatU   ) |,
                       abbrev('METERS'     , whatU   )      then  m=N
                  when abbrev('KILOMETRES' , whatU,2 ) |,
                       abbrev('KILOMETERS' , whatU,2 ) |,
                       abbrev('KMS'        , whatU,  )      then  m=N * KM
                  when abbrev('CENTIMETRES', whatU,2 ) |,
                       abbrev('CENTIMETERS', whatU,2 ) |,
                       abbrev('CMS'        , whatU,2 )      then  m=N / CM
                  when abbrev('ARSHINS'    , whatU   )      then  m=N / arshin
                  when abbrev('DIUYM'      , whatU   )      then  m=N / diuym
                  when abbrev('FUT'        , whatU   )      then  m=N / fut
                  when abbrev('LINIYA'     , whatU   )      then  m=N / liniya
                  when abbrev('PIADS'      , whatU   ) |,
                       abbrev('CHETVERTS'  , whatU,2 )      then  m=N / piad
                  when abbrev('SAZHENS'    , whatU   )      then  m=N / sazhen
                  when abbrev('TOCHKA'     , whatU   )      then  m=N / tochka
                  when abbrev('VERSHOKS'   , whatU,5 )      then  m=N / vershok
                  when abbrev('VERSTAS'    , whatU,5 ) |,
                       abbrev('VERSTS'     , whatU,2 )      then  m=N / verst
                  when abbrev('MILIA'      , whatU,2 )      then  m=N / milia
                  otherwise     call err   'invalid measure name: '    what
                  end   /*select*/
                                         say centre('metric',sw,"─")

call tell m/KM , 'kilometer' call tell m , 'meter' call tell m*CM , 'centimeter'

                                         say centre('old Russian',sw,"─")

call tell m*milia , 'milia' call tell m*verst , 'verst' call tell m*sazhen , 'sazhen' call tell m*arshin , 'arshin' call tell m*fut , 'fut' call tell m*piad , 'piad' call tell m*vershok , 'vershok' call tell m*diuym , 'diuym' call tell m*liniya , 'liniya' call tell m*tochka , 'tochka' /* ◄─── TELL only shows eight digits. */ exit /*stick a fork in it, we're all done. */ /*────────────────────────────────────────────────────────────────────────────*/ err: say center('error!',sw%2,"*"); do j=1 to arg(); say arg(j); end; exit 13 s: if arg(1)=1 then return arg(3); return word(arg(2) 's',1) /*plural*/ tell: parse arg $; numeric digits 8; $=$/1; say right($,40) arg(2)s($); return</lang> This REXX program makes use of   LINESIZE   REXX program (or BIF) which is used to determine the screen width (or linesize) of the terminal (console).
The   LINESIZE.REX   REXX program is included here ──►   LINESIZE.REX.

output when using the input of:   100   metres

────────────────────────────────────metric─────────────────────────────────────
                                     0.1 kilometers
                                     100 meters
                                   10000 centimeters
──────────────────────────────────old Russian──────────────────────────────────
                             0.062480475 milias
                             0.093720713 versts
                               46.860356 sazhens
                               140.58107 arshins
                               328.02249 futs
                               562.32428 piads
                               2249.2971 vershoks
                               3936.2699 diuyms
                               39362.699 liniyas
                               393626.99 tochkas

output when using the input of:   1.4058107   arshins

────────────────────────────────────metric─────────────────────────────────────
                                   0.001 kilometers
                                       1 meter
                                     100 centimeters
──────────────────────────────────old Russian──────────────────────────────────
                           0.00062480476 milias
                           0.00093720713 versts
                              0.46860357 sazhens
                               1.4058107 arshins
                                3.280225 futs
                               5.6232428 piads
                               22.492971 vershoks
                                 39.3627 diuyms
                                 393.627 liniyas
                                 3936.27 tochkas

output when using the input of: -46.860366   sazhens

────────────────────────────────────metric─────────────────────────────────────
                             -0.10000002 kilometers
                              -100.00002 meters
                              -10000.002 centimeters
──────────────────────────────────old Russian──────────────────────────────────
                            -0.062480488 milias
                            -0.093720732 versts
                              -46.860366 sazhens
                               -140.5811 arshins
                              -328.02256 futs
                              -562.32439 piads
                              -2249.2976 vershoks
                              -3936.2707 diuyms
                              -39362.707 liniyas
                              -393627.07 tochkas

Tcl

Tcllib already has a units package which knows about a lot of things, and can be taught more. Since the other examples in this page provide a nicely tabulated conversions for 1 meter, we can copy that directly to get started ...

<lang Tcl> package require units

set russian_units {

     arshin  1.40607
 centimeter  100
      diuym  39.3701
        fut  3.28084
  kilometer  0.001
     liniya  393.701
      meter  1
      milia  0.000133912
       piad  5.6243
     sazhen  0.468691
     tochka  3937.01
    vershok  22.4972
     versta  0.000937383

}

proc add_russian_units {} {

   foreach {name factor} $::russian_units {
       if {$name eq "meter"} continue
       set factor [expr {1/$factor}]
       units::new $name "$factor meters"   ;# teach units about the new unit
   }

}

proc demo {} {  ;# show some examples

   foreach base {"1 meter" "1 milia"} {
       puts "$base to:"
       foreach {unit _} $::russian_units {
           puts [format " %-12s: %s" $unit [units::convert $base $unit]]
       }
       puts ""
   }

}

add_russian_units demo </lang>

Output:

1 meter to:
 arshin      : 1.40607
 centimeter  : 100.0
 diuym       : 39.3701
 fut         : 3.28084
 kilometer   : 0.001
 liniya      : 393.701
 meter       : 1.0
 milia       : 0.000133912
 piad        : 5.6243
 sazhen      : 0.46869099999999997
 tochka      : 3937.01
 vershok     : 22.4972
 versta      : 0.000937383

1 milia to:
 arshin      : 10499.955194456059
 centimeter  : 746759.065655057
 diuym       : 293999.7909074616
 fut         : 24499.97012963737
 kilometer   : 7.46759065655057
 liniya      : 2939997.909074616
 meter       : 7467.59065655057
 milia       : 1.0
 piad        : 41999.970129637375
 sazhen      : 3499.9925324093433
 tochka      : 29399979.09074616
 vershok     : 167999.8805185495
 versta      : 6.999992532409343

One nice side effect of this implementation is that units can work with more complex dimensions:

<lang Tcl> % units::convert "1 piad^2" "hectare" 3.1612805858160454e-6 % units::convert "100 km/h" "versta/minute" 1.562305 </lang>