Respuesta :

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.

Extract Form: 1094189131512000000
Decimal Form: 1.09418989 * [tex] 10^{20} [/tex]
ACCESS MORE
ACCESS MORE
ACCESS MORE
ACCESS MORE