Fucking math 120

How would i solve this using logs with and without a calculator?

3^x=54
I have an idea, but when i put it into Log(54) (base 3)=X, but here i get stuck. Do i divide the log of 54 by the log of 3?

>>8
x = \frac{\mbox{ln}54}{\mbox{ln}3}
=/=
x = \mbox{ln}(\frac{54}{3})