Solve problem "Factorial" online - Learn Python 3 - Snakify

## Statement

In mathematics, the factorial of an integer $$n$$, denoted by $$n!$$ is the following product: $$n! = 1 \times 2 \times \ldots \times n$$

For the given integer $$n$$ calculate the value $$n!$$. Don't use math module in this exercise.

In all the problems input the data using input() and print the result using print().

4
24
1
1
2
2
3
6
5
120
6
720
7
5040
8
40320
9
362880
10
3628800
11
39916800
12
479001600