What is these (0**9

Answer 1

Thats operator for exponentiation/power

Your operation basicly means
0*0*0*0*0*0*0*0*0

Answer 2

It's 0 raised to the power 9 so it should be 0.
I think it would be more helpful for you if you try it first in the playground.

Answer 3

Multiplying 0 9timis=0*0*0*0*0*0*0*0*0