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: [-84.485, 125.356, 186.954, 141.378, 33.445, 175.804, 90.426, 75.923]

93.1