Plugin Calculator. Ver 2.6.
   Supports 19 operators, 21 functions +
   User Defined Functions/Constants - Unlimited Variations.
                 Igor Ruskih. () 1998.

How You can start this PlugIn??

1. Create subdirectory in Far\PlugIns\ (fe: PlugCalc) and copy all Calc files.
2. Restart Far Manager and Calculator is ready for work:
        F11(PlugIns Menu) - Calculator.

You will find 3 files with this program: Calc_E.reg and Calc_R.reg.
  You can run them according the selected language (this is a
  RegEdit files), and they set key-macros for Ctrl-F6 keys.  Ctrl-Alt-F6 will
  be uset for Calc configuration Calls.
  (In Far 1.6 this keys will be used for calling Calc from Editor and Viewer).
Use file Calc_E.reg for English and Calc_R.reg for Russian languages.
  UserDef.reg file defines some user functions and constants(for example).
  You can also run It.

PS:
  Before running these files be sure, that the 'Hot Key' in PlugIns Menu is
  correct. Elseif, You can try to define your own keys.

  Thats All. 
                                                Thanks, Read Help.
                                                        Igor Ruskih.