PROGRAMMING:JMU Python piecewise function 1
This topic requires the calculation of the value of the following piecewise function f (x) (x is an arbitrary real number input from the keyboard)
![ Piecewise function 1. JPG] (~ / 347af306-4f72-4dbc-a05e-afd5e51c0e08. JPG)
###Input format:
Enter a real number directly to x without any additional characters.
###Output format:
Output in the format of "f (x) = result" in one line, where * * x and result retain three decimal places * *.
###Input example:
```in
seven hundred and twenty-five
```
###Output example:
```out
f(725.000)=-1.000
```
answer：If there is no answer, please comment
![ Piecewise function 1. JPG] (~ / 347af306-4f72-4dbc-a05e-afd5e51c0e08. JPG)
###Input format:
Enter a real number directly to x without any additional characters.
###Output format:
Output in the format of "f (x) = result" in one line, where * * x and result retain three decimal places * *.
###Input example:
```in
seven hundred and twenty-five
```
###Output example:
```out
f(725.000)=-1.000
```
answer：If there is no answer, please comment