I have a show countdown clock that sets it's time in seconds, generally I use the calculator to enter the start time, 60*60 = 1 Hour; However I found that doing math on some types does not work.
The good:
Percent/Fine 5x5 = 25
Physical 0.5 * 0.5 = 0.25
Dec24 50 * 50 = 2500
Hex24 FF * FF = FE01
The Bad:
Dec8 5 * 5 = 255
Dec16 50 * 50 = 255
Hex8 F * F = FF
Hex16 FF * FF = FF
The bad ones are either 0 or 255 depending on the math (1 + 1 = 0 in dec16)