HACKS Using Command Prompt as Calculator
The command processor CMD.EXE comes with a mini-calculator that can perform simple arithmetic on 32-bit signed integers:
e.g.
C:>set /a 2+2
4
C:>set /a 2*(9/2)
8
C:>set /a (2*9)/2
9
C:>set /a "31>>2"
7
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