Super Mario Maker can help you with your homework, thanks to one intrepid level designer.
The Cluttered Chaos-Calculator stage by Reddit user Helgefan is a literal calculator. It only does simple addition, but there doesn’t appear to be anything simple about how it accomplishes the feat.
Only the beginning of the stage is interactive, with players taking Mario through columns to select the two numbers they’d like to add. You can skip learning how to make that work yourself by watching our video playthrough.