Answer:
6^8 = 1679616
Explanation:
You want the simplified form of the expression (6^4)^2.
Rules of exponents
The applicable rule of exponents is ...
(a^b)^c = a^(bc)
Application
We have a=6, b=4, c=2, so the expression simplifies to ...
(6^4)^2 = 6^(4·2) = 6^8 = 1679616
__
Additional comment
If you want the final numerical value, rather than the exponent form, a calculator will find that value for you from either form of the expression.