Answer
$10! = 3,628,800$
Work Step by Step
RECALL:
(1) For any natural number $n$,
$n! = n(n-1)(n-2)(n-3)...$
(2) $0!=1$
Use the definition in (1) above to obtain:
$10!=10(9)(8)(7)(6)(5)(4)(3)(2)(1) = 3,628,800$
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