1.8. Exercise: Jogging at Devrim 2

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A student is jogging on the tracks at the Devrim Stadium. This jogging session is divided into 4 intervals. Given the average speed (in meters per second) and duration of the interval (in seconds) for each of the 4 intervals and the length of one lap (i.e. distance around the running track, in meters) calculate and print the number of laps the student has taken during his/her jogging session as a float. (1 digit after the decimal point is sufficient)

Inputs will be given as floats in the following order:

  • Average speed for 1st interval

  • Duration of 1st interval

  • Average speed for 2nd interval

  • Duration of 2nd interval

  • Average speed for 3rd interval

  • Duration of 3rd interval

  • Average speed for 4th interval

  • Duration of 4th interval

  • Length of one lap

Sample I/O:

Input:
6
420
5.5
240
7
300
3.5
180
400

Output :
16.4

Input:
4.2
300
5.9
240
7.8
260
4.4
200
420

Output:
13.3