Question

How do you evaluate the expression `8!`?

Answer 1

`8!` `=` `8xx7xx6xx5xx4xx3xx2xx1`

Explanation:

So `8!` `=` `56xx30xx12xx2`, 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?