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The command processor CMD.EXE comes with a mini-calculator that can perform simple arithmetic on 32-bit signed integers:
C:\>set /a 2+24C:\>set /a 2*(9/2)8C:\>set /a (2*9)/29C:\>set /a "31>>2"7
Note that we had to quote the shift operator since it would otherwise be misinterpreted as a "redirect stdout and append" operator.
For more information, type set /? at the command prompt.

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