I'm doing a very basic pre algebra "refreshment", and for an assignment I need to simplify the following, leaving my answer as a single base raised to a single exponent:

9^2 * 12^3 * 2

I can't seem to find the steps needed to get the answer which is supposed to be 6^7. Normally I would look for common bases (like 9 and 27 have 3 in common), but I don't see that in 9 and 12.

Can someone explain this to me?