hi dear ;
Step 1
{ as you know 1/a = a ^(-1) }....
1/3 = 3 ^(-1)
Step 2
9 = 3 ^2
(9 ^3) = (3^2)^3
{ as you know , (a^n)^m = a ^ ( n*m) }.........
= 3 ^ 6
Step 3
3 ^(-1) * 3 ^ 6
{ as you know , a ^m * a ^ n = a ^ ( m + n) } ....
so
= 3 ^ ( -1 + 6)
= 3 ^ 5
= 243
Good Luck dear