প্রথমে একটি নোট প্যাড খুলুন এবং নিচের কোডগুলো কপি করুন ।  তারপর clac.bat এই নাম এ সেইভ করুন । তৈরি হয়ে গেল ক্যালকুলেটর!

Code is here......................

@echo off
color 0A
title CALCULATOR VERSION 1.2
:loop
cls
echo by Munna
echo _
echo by [email protected]
echo.
echo Calculator Version 1.2
echo -----------------------------------------------
echo * = MULTIPLY
echo + = ADD
echo - = SUBTRACT
echo 2 = SQUARED
echo / = DIVIDE
echo After an equation, type CLEAR to clear the screen of your equations, type KEEP to leave them there, or type EXIT to leave.
:noclear
set /p UDefine=
set /a UDefine=%UDefine%
echo.
echo =
echo.
echo %UDefine%
echo KEEP, CLEAR, OR EXIT?
set /p clearexitkeep=
if %clearexitkeep%==CLEAR goto loop
if %clearexitkeep%==KEEP echo. && goto noclear
if %clearexitkeep%==EXIT (exit)
:misspell
echo.
echo -----------------------------------------------
echo You misspelled your command. Please try again (make sure you are typing in all caps LIKE THIS).
echo Commands:
echo CLEAR Clear all previous equations and continue calculating.
echo KEEP Keep all previous equations and continue calculating.
echo EXIT Leave your calculating session
echo Enter in a command now.
set /p clearexitkeep=
if %clearexitkeep%==CLEAR goto loop
if %clearexitkeep%==EXIT (exit)
if %clearexitkeep%==KEEP goto noclear
goto misspell