10!=10\*9\*8\*7\*6\*5\*4\*3\*2\*1
https://feddit.org/post/26532917
10! means ten factorial. So 10 * 9 * 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1.
10!
It’s a common math joke.