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:
[80.113, -28.006, -40.254, 222.454, 29.784, 129.871, 141.71, -44.716, -22.74]

Ex Output:
52.024

Ex Input:
[14.818, 98.871, -79.033]

Ex Output:
11.552

Ex Input:
[157.792, -49.364, -85.505, -85.29, -26.457, 128.611]

Ex Output:
6.631