PROGRAMMING:Average speed in miles
Suppose a runner runs D kilometers in M minutes s seconds. Write a program to show the average speed in miles per hour（ Note: 1 mile equals 1.6 kilometers)
###Input format:
Give three positive integers in one line, m, s, D.
###Output format:
Output the average speed in miles per hour. Keep 2 decimal places.
###Input example:
```in
45 30 14
```
###Output example:
```out
eleven point five four
```
answer：If there is no answer, please comment
###Input format:
Give three positive integers in one line, m, s, D.
###Output format:
Output the average speed in miles per hour. Keep 2 decimal places.
###Input example:
```in
45 30 14
```
###Output example:
```out
eleven point five four
```
answer：If there is no answer, please comment