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: [-84.291, 87.058, 222.093, -24.8, 33.462, 146.028, 102.483, 123.502]

75.692