Asslamualaikum, How are you friends.
Today i will teach you how to make a calculator via notepad.
(1) Open a NotePad.
(2) Paste this code there



@echo off
title Batch Calculator by (K@BBO)
color 0c
:top
echo ————————————–
echo -Welcome to Batch Calculator by *(K@BBO)!-
echo ————————————–
echo Enter your operand
echo.
set /p sum=
set /a ans=%sum%
echo.
echo = %ans%
echo ————————————————————–
pause
cls
echo Previous Answer: %ans%
goto top
pause
exit



Now save it with extention .BAT