PROGRAMMING:The number of zeros at the end of the factorial
Please n! How many zeros are there at the end?
###Input format:
Input multiple groups of data, each group occupies a row, and each row includes a positive integer n (n < = 1000000)
###Output format:
Output n! How many zeros are at the end.
###Input example:
```in
five
one hundred
```
###Output example:
```out
one
twenty-four
```
answer：If there is no answer, please comment
###Input format:
Input multiple groups of data, each group occupies a row, and each row includes a positive integer n (n < = 1000000)
###Output format:
Output n! How many zeros are at the end.
###Input example:
```in
five
one hundred
```
###Output example:
```out
one
twenty-four
```
answer：If there is no answer, please comment