387 420 489 is right
31,381,059,609 Or more simply, 9 to the eleventh power.
54 That is 9*6 not 9*9*9*9*9*9 which is 96 = 531441
6561
9 x 9 x 9 x 9 x 9, or 9^5, is equal to 59049.
9 x 9 x 9 x 9 = 6561
94 is.
9 times 9= 81
729
6561
9 times 9 is 81
9 times 1 =9