Answer
$9!=362,880$
Work Step by Step
Using the factorial of a number which is given by $n!=n(n-1)(n-2)...(3)(2)(1),$ the given expression, $
9!
,$ is equivalent to
\begin{align*}
&
9(8)(7)(6)(5)(4)(3)(2)(1)
\\&=
362,880
.\end{align*}
Hence, $
9!=362,880
.$
