How do you simplify $72times7!$ ?

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Answer 1 · 2016-09-10T07:09:23

$9!$

2 of the factors of 72 are $9xx8$

$7!$ means $7xx6xx5xx4xx3xx2xx1$

Combining $9 xx 8 " with " 7!$ very neatly gives $9!$

How do you simplify 72times7!72times7!?