Algodoo

-Given that the small spinning wheel at the bottom has 13 teeth and is rotating at a rate of 100 rpm, all the small gears have 13 teeth, all the large gears have 52 teeth, find the gear ratio and how long it will take in days, for the last gear to make one revolution.

- The very last gear is fixed. How?!

-Also, how is it possible for the small gear to be spinning so fast, yet the last wheel is fixed?!?

- This is just a fun little puzzle. So Plz Rate And Comment!