It is 9*9 21 times so
9*9*9*9*9*9*9*9*9*9*9*9*9*9*9*9*9*9*9*9*9=
1.09418989e20 is the answer.
Step-by-step explanation:

check the picture below.
now, if we split that triangle like so with that red line, we can use the right-triangle there, to get θ.
