I'm assuming this is
(3 a^-3)*(4 a^5)
Do you have a notion what it might be? Could you write this as a fraction, with a denominator?
I'm trying to figure out where you're having difficulty.
If you are telling that 3a^-3 * 4a^5 is something like
................... ,
then it's simple. Just multiply the whole numbers together, and the bases together (folow the law - when equal bases are multiplied, the indices are added. Simple. c:
...................