Factorial/Examples/11

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Example of Factorial

$11! = 39 \, 916 \, 800$


Proof

From Examples of Factorials:

$10! = 3 \, 628 \, 800$

Then:

 3 628 800
x       11
----------
 3 628 800
36 288 000
----------
39 916 800

$\blacksquare$