10*2 belongs to the ninth monkey.

The eighth is 10*2*(3/2).

10*2*(3/2)*(4/3) belongs to the seventh monkey.

And so on, the first one is10 * 2 * (3/2) * (4/3) * (5/4) * (6/5) (7/6) * (8/7) * (9/8) * (10.

So there is 100.

I hope my answer can help you.