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:
[89.776, -37.895, -45.315, 75.805, 144.052, 150.156]

Ex Output:
62.763


Ex Input:
[207.165, 246.399, 44.821, -21.671]

Ex Output:
119.178


Ex Input:
[166.029, -82.901, 110.004, 224.045, 176.063, 64.636, 135.812, 44.925, 137.313]

Ex Output:

108.436