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:
[-51.603, 117.351, -67.451, 218.664, 68.981, 167.005, -53.851, 104.996]

Ex Output:
63.012


Ex Input:
[-18.001, 51.172, -66.333, -79.852, 93.818, 230.012, 55.556, -63.057, 124.868]

Ex Output:

36.465