There are two gears. One has 24 pointers (Big) and another has 10 pointers (Small).
Big gear only rotates on his place, where small gear rotates on his place along with rotating around big one. (mostly like our sun and earth).
When big gear moves 3 points than small gear moves 2.5 degree around big gear.
How many rotation did big one has to complete to make small one rotate around him for 1 time.