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.

[2.81, 52.99, 55.279, 75.682, 73.835, 148.077, -54.162, 112.112]
58.328

[211.292, 92.275, 128.423, 242.327, -54.053, 89.501, 64.784]
110.65

[14.818, 98.871, -79.033]

11.552