We have a rule here that helps on this one......
log a - log b = log(a/b) Note that the bases have to be the same!!
So we have
log3 54 - log3 2 = log3 (54/2) = log3 27
And remember, we're just asking, "What power do we put on 3 to raise 3 to 27??"
The answer is.........3 !!!!