36! = 1x 2 x3x 4 x 5 x 6 x 7 x 8 x 9 x 10x 1x 12x 13x 14x 15x 16x 17x 1 8x 19 x 20 x 2 1x 22 x 23 x 25 x 26 x 27 x 27

I don't know the concept of factorial in grade five. In fact, I can also give 3 according to the topic! = 1x2x3，4！ = 1x2x3x4，5！ = 1x2x4x5，36！ Result.

The concept of factorial:

Factorial factor is a mathematical operation symbol.

The factorial of a positive integer is the product of all positive integers less than or equal to this number, and the factorial of 0 is 1. The factorial writing of natural number n! .

Representation: n factorial representation of any natural number greater than 1;

n！ = 1×2×3×...×n