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:
[-2.772, 225.483, 211.749, 45.779, -82.623, 229.799, 107.783, 64.653]

Ex Output:
99.981


Ex Input:
[89.583, 153.453, 20.381, -17.436, -31.071, 91.041, 198.063]

Ex Output:
72.002


Ex Input:
[58.978, 130.099, 69.294, 221.896, 145.41, 24.831, 59.427, 198.174, 146.553]

Ex Output:

117.185