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:
[-17.026, 165.89]

Ex Output:
74.432


Ex Input:
[-79.597, 26.839, 178.556, -5.626, -37.294, 232.757, 136.684]

Ex Output:
64.617


Ex Input:
[16.315, 212.855, 144.117, 234.26, 229.396, 41.769, 37.15, 175.404]

Ex Output:

136.408