PROGRAMMING:Calculates the floating point value of a fraction
###Task description
Two integers a and B are used as numerator and denominator respectively, i.e. fraction A / B, to find its floating-point value (double precision floating-point number, with 9 decimal places reserved)
###Input format:
Input only one line, including two integers a and B
###Output format:
Output only one line, fractional A / b floating-point value (double precision floating-point number, 9 decimal places reserved)
###Input example:
```in
5 7
```
###Output example:
```out
zero point seven one four two eight five seven one four
```
###Tips
Note: this topic is selected from openjudge website http://noi.openjudge.cn/ch0103/05/ .
answer：If there is no answer, please comment
Two integers a and B are used as numerator and denominator respectively, i.e. fraction A / B, to find its floating-point value (double precision floating-point number, with 9 decimal places reserved)
###Input format:
Input only one line, including two integers a and B
###Output format:
Output only one line, fractional A / b floating-point value (double precision floating-point number, 9 decimal places reserved)
###Input example:
```in
5 7
```
###Output example:
```out
zero point seven one four two eight five seven one four
```
###Tips
Note: this topic is selected from openjudge website http://noi.openjudge.cn/ch0103/05/ .
answer：If there is no answer, please comment