mckobe

@echo off
setlocal enableDelayedExpansion
set/a A=%random%%%5*9
set/a B=(%random%%%3+1)*3
set fuhao=+-*/
set/a n=0
:calc
if not "!fuhao:~%n%,1!"=="" (set/a RS=%A%!fuhao:~%n%,1!%B%&echo %A% !fuhao:~%n%,1! %B% = !RS!)
set/a n+=1
goto :calc
pause>nul
goto :eof