PROGRAMMING:Calculating piecewise function [3]

This topic requires the calculation of the following piecewise function $$f (x) $:
###Input format:
The input gives the real number x on one line.
###Output format:
Output in the format of "f (x) = result" in one line, where both X and result retain one decimal place.
###Input sample 1:
```in
ten
```
###Output sample 1:
```out
f(10.0) = 0.1
```
###Input example 2:
```
two hundred and thirty-four
```
###Output example 2:
```
f(234.0) = 234.0
```






answer：If there is no answer, please comment