Functioning analog calculator (BDP)

So this is an analog calculator. It was inspired by a workshop on classic DAF CVT technology (automatic transmission) I went to with my father in law a few years ago. I thought it would be fun to make a calculator on the same basic principle. Multiplication works left to right, division the other way around. Adding is turning upwards and subtracting downwards. I submitted it to the bricklink designer program. The link is here:...