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:
[-92.0, 108.814, 164.207, 94.26, 33.74]

Ex Output:
61.804


Ex Input:
[217.523, 92.701, -55.65, -89.359, 55.742, 158.634, -31.883, 206.554]

Ex Output:
69.283


Ex Input:
[-15.093, 123.615, -61.024, 139.291]

Ex Output:

46.697