Let's get Mathematical Part 9

Given: minute wheel 48 teeth, minute wheel pinion 12 leaves, hour wheel 36 teeth. How many leaves does the cannon pinion have?

Motion work ratio is almost always 12:1

N1 = Z1 Z3
N2 Z2 Z4

1 = 12 x ?
12 48 x 36

1 x ?
4 x 36

1 x ?
144

144/12 = 12