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:
[12.155, 204.528, 85.84, 66.186]

Ex Output:
92.177


Ex Input:
[60.02, -66.628, -95.571, 114.26, 109.577, 141.08, 154.303, 228.454, 46.856, 7.365]

Ex Output:
69.972


Ex Input:
[9.323, 61.048, 205.465, 120.938, 31.725]

Ex Output:

85.7