Create your own calculator

Open a notepad (or any other text editor) file and paste the following code in it:
Code:
@ECHO OFF
color 2a
title My Calculator
pause
ECHO ---------------------------------------- -------
ECHO * = MULTIPLY
ECHO + = ADD
ECHO - = SUBTRACT
ECHO / =DIVIDE
ECHO ---------------------------------------- -------
pause

:loop
echo.
echo ---------------------------------------- -------
SET /p UDefine=
SET /a UDefine=%UDefine%
ECHO =
ECHO %UDefine%
ECHO.

Save the notepad file with a name say “calc.bat” or "Anynameyouwant.bat" where .bat is extension for batch files. Now click on the batch file icon and there opens your own calculator in command prompt window.