# How do you evaluate the expression 8!?

8! $=$ $8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1$
So 8! $=$ $56 \times 30 \times 12 \times 2$, but this is a bit too much arithmetic for me. There should be a factorial operator on your calculator.
Sometimes, you will see expressions of the form (8!)/(7!). Clearly, (8!)/(7!)=8, why?