In this task you will be given a list of numbers and you need to find the mean (average) of that list. The mean of a list can be found by summing every number in the list then dividing the result by the size of that list. The output should be rounded to 3 decimal places.

Ex Input:
[135.575, 134.352, 209.54, 199.614, 87.027, 215.933, 49.266, 167.288, 164.589]

Ex Output:
151.465


Ex Input:
[99.278, 72.353, -21.292]

Ex Output:
50.113


Ex Input:
[246.363, 47.04, -80.805, 163.312, 236.199, -88.808, 119.739, 106.244, -19.212, 94.629]

Ex Output:

82.47