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.

[-44.471, 208.445, 208.318, -34.134]
84.54

[21.659, 63.646, -97.361]
-4.019

[70.746, 33.658]

52.202