Which expression does this power represent?

10^8


10 × 8

10 × 10 × 10 × 10 × 10 × 10 × 10 × 10

10 × 8 × 10 × 8 × 10 × 8 × 10 × 8 × 10 × 8 × 10 × 8 × 10 × 8 × 10 × 8

8 × 8 × 8 × 8 × 8 × 8 × 8 × 8 × 8 × 8