Definition: 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.
Input: [-41.37, 177.775, -82.325, 169.323, 61.3, -11.437, -49.076, 114.922]

42.389