When doing a power of a power, you can just leave the base ( In this case the 10 in parenthesis) and then just multiply the 2 exponents ( 8 and 2)
10^(8x2) x 10
10^16 x 10
When multiplying 2 terms with the same base (in this case both terms have the base 10) you can just leave the base untouched and add the exponents
And since 10 is the same thing as 10^1, 10^16 x 10 is the same as:
10^16 x 10^1
Which is:
10^(16+1)
10^17
or 100,000,000,000,000,000
Hope it helps (• ε •)
