Factorial/Examples/12

Example of Factorial

$12! = 479 \, 001 \, 600$

Proof

From $11$ factorial:

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

Then:

 39 916 800
x        12
-----------
 79 833 600
399 168 000
-----------
479 001 600

$\blacksquare$