PROGRAMMING:Find the exact n!
n!= 1*2*3...*n.
n!= n*(n-1)*(n-2)...*1.
In 1751, Euler expressed m factorial with capital letter M, M = 1 * 2 * 3... * M
In 1799, rufeni published his works on equations in small letters π Denotes the m-factorial
In 1813, Gauss took the lead Π( n) To express the n-factorial
And the factorial sign N was first proposed! Kram (1808) was the most popular one. It was advocated by Ohm and so on
When n is large, calculate n! In this case, the Stirling formula can be used to calculate the approximate value or obtain the size range
Give an integer n, find n
###Input format:
Input multiple sets of data, each data line, each line has only one integer n (n < = 10000)
###Output format:
For each integer n, output the corresponding n
###Input example:
Here is a set of inputs. For example:
```in
one
two
three
```
###Output example:
The corresponding output is given here. For example:
```out
one
two
six
```
answer：If there is no answer, please comment
n!= n*(n-1)*(n-2)...*1.
In 1751, Euler expressed m factorial with capital letter M, M = 1 * 2 * 3... * M
In 1799, rufeni published his works on equations in small letters π Denotes the m-factorial
In 1813, Gauss took the lead Π( n) To express the n-factorial
And the factorial sign N was first proposed! Kram (1808) was the most popular one. It was advocated by Ohm and so on
When n is large, calculate n! In this case, the Stirling formula can be used to calculate the approximate value or obtain the size range
Give an integer n, find n
###Input format:
Input multiple sets of data, each data line, each line has only one integer n (n < = 10000)
###Output format:
For each integer n, output the corresponding n
###Input example:
Here is a set of inputs. For example:
```in
one
two
three
```
###Output example:
The corresponding output is given here. For example:
```out
one
two
six
```
answer：If there is no answer, please comment