PROGRAMMING:Fahrenheit to centigrade
Convert Fahrenheit to centigrade (where C is centigrade and F is Fahrenheit).
c=5/9 (f-32)
###Input format:
Enter a real number directly without any additional characters.
###Output format:
Output in the order of "C = result" in one line, the result is a real number with 2 decimal places, without any additional format control.
###Input example:
```in
thirty-four
```
###Output example:
```out
c=1.11
```
answer：If there is no answer, please comment
c=5/9 (f-32)
###Input format:
Enter a real number directly without any additional characters.
###Output format:
Output in the order of "C = result" in one line, the result is a real number with 2 decimal places, without any additional format control.
###Input example:
```in
thirty-four
```
###Output example:
```out
c=1.11
```
answer：If there is no answer, please comment