3^m=6
9^n=2
3^(2m-3n)/3^(n-1)
=3^(2m-3n-n+1)
=3^(2m-2n+1)
=3^(2m)*3/3^(2n)
=3^m*3^m*3/9^n
=6*6*3/2
=54