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:
[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:
[219.336, -29.108, -41.612, 105.709]

Ex Output:
63.581


Ex Input:
[85.366, 103.422, 117.646]

Ex Output:

102.145