how do u multiply 5x5x5x5x4x4x4 into exponents
Your question is not clear. If you mean that if these were exponents, how would you multiply them?
Such as 10^5 X 10^4......? If that's what you mean, then all you do is ADD the exponents together.
So, in this example 5+4=9 and that's the exponent of 10=10^9. Hope that's what you want.