Answer
$3,628,880$
Work Step by Step
Definition of a factorial $n!=n(n-1)(n-2)\cdot...\cdot3\cdot2 \cdot 1$
Therefore, we have:
$10(9!)=10 \cdot 9 \times 8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1=3,628, 880$
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