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:
[88.755, -64.951, 41.008]

Ex Output:
21.604


Ex Input:
[214.656, -82.183, 105.038, -34.9, -44.836, 143.236, 183.045, 160.483, 34.398]

Ex Output:
75.437


Ex Input:
[-7.462, 97.261, -21.324, -10.676]

Ex Output:

14.45