Factorials (ACT). Game on.

$3! = 3 \times 2 \times 1 = 6\textsf{.}$

$6! = 6 \times 5 \times 4 \times 3 \times 2 \times 1 = 720\textsf{.}$

$2! = 2 \times 1 = 2\textsf{.}$

By definition, $0! = 1\textsf{.}$

$1! = 1\textsf{.}$

$7! = 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1 = 5040\textsf{.}$

$8! = 8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1 = 40320\textsf{.}$

$9! = 9 \times 8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1 = 362880\textsf{.}$