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:
[169.922, 249.47, 142.453, -55.768, 155.357, 6.096, -95.702, 243.569, 31.11, -75.031]

Ex Output:
77.148


Ex Input:
[109.109, -95.395, 5.04, 45.497, 56.443, -72.916]

Ex Output:
7.963


Ex Input:
[-98.078, 1.658, 117.219, -29.015, 204.611, 140.073, 4.792, -10.659]

Ex Output:

41.325