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:
[49.462, -87.869, 36.985, 94.248, 175.789]

Ex Output:
53.723


Ex Input:
[199.874, -45.634, -39.343, 75.985, 143.35, 87.15, 120.645, -34.636, 159.567]

Ex Output:
74.106


Ex Input:
[-85.202, 41.205, 242.359, -84.8, 199.285, 56.254, 67.95, 218.03]

Ex Output:

81.885