PROGRAMMING:Buy Apple
Input the price for apple and the amount you buy , calculate how much you should pay.
### Input:
Two numbers separated by ','.
### Output:
One number.
### Input sample:
```
5.4,3.2
```
### Out put samples:
```
seventeen point two eight zero zero zero zero
```
answer：If there is no answer, please comment
### Input:
Two numbers separated by ','.
### Output:
One number.
### Input sample:
```
5.4,3.2
```
### Out put samples:
```
seventeen point two eight zero zero zero zero
```
answer：If there is no answer, please comment