PROGRAMMING:Robot crossing bridge (error correction version)

It is known that each step of the robot can advance $$x $$meters, while the bridge is $$a $$meters long. The robot has to walk $$s $$steps to cross the bridge. Please write a program, input $$x $$and $$M $$, calculate and output $$s $.
####Input format
>$$x $$and $$a$$
####Output format
> $$s$$
####Sample input 1
```in
0.77 235.33
```
####Sample output 1
```out
three hundred and six
```
####Sample input 2
```in
0.72 39.60
```
####Sample output 2
```out
fifty-five
```
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Requirement: consider the error of real number.







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