Add the exponents if the bases are the same, multiply the bases if the exponents are the same, if nothing is the same just solve it.
Hmmm idk if you want fractions but, 65/24 or 2 17/24 I think
-2 | 2 4 2 8 8
. | . -4 0 -4 -8
-------------------------------
. | 2 0 2 4 0
which translates to
There are 10 rooms per floor if there are 30 floors then there are 300 rooms
Divide the 3 from the 3c, and move over towards the 3 on the right side of the equation. 3 ÷ 3 = 1, so c = 1.