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: [-41.493, 216.718, 4.353, 164.451, 238.998, 55.396, 236.143, -28.346]

105.778