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:
[195.019, 144.893, 32.821, -21.855, 136.755]

Ex Output:
97.527


Ex Input:
[116.268, 173.27, 228.827, 52.695, 66.445, -34.051, 152.137]

Ex Output:
107.942


Ex Input:
[-39.282, 206.858, 196.099, -35.2, 81.961, 211.819, 44.598, 97.441, -66.653, 66.857]

Ex Output:

76.45