M: Switch modes (1 = Addition, 2 = Subtraction, 3 = Multiplication and 4 = Division) SET INPUT: Sets the selected input to the number you give it (duh). To get your number output, simply press Space. To reset the output, inputs and mode, simply click the flag again.
Please note that even with Scratch's (semi-)robust mathematical system, I would prefer (a) only using numbers and (b) using numbers ranging from -2147483647 to 2147483647 as these are the smallest and largest hexadecimal numbers. oh yeah and also make sure that you don't break the entire thing that too
