PROGRAMMING:Triangle area (error correction version)
Please write a program, input the bottom $$B $$and height $$h $$of the triangle, calculate and output the area of the triangle $$a $.
![ Title. JPG] (~ / cafc7e34-5643-4e13-9290-7147a9863e04. JPG)
####Input format
>$$B $$and $$h$$
####Output format
> $$a$$
####Input sample
```in
5.3 0.7
```
####Output sample
```out
one point eight six
```
Requirements: output 2 decimal places (rounded at the end).
---
Tip: pay attention to the error of real number.
answer：If there is no answer, please comment
![ Title. JPG] (~ / cafc7e34-5643-4e13-9290-7147a9863e04. JPG)
####Input format
>$$B $$and $$h$$
####Output format
> $$a$$
####Input sample
```in
5.3 0.7
```
####Output sample
```out
one point eight six
```
Requirements: output 2 decimal places (rounded at the end).
---
Tip: pay attention to the error of real number.
answer：If there is no answer, please comment