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: [229.086, 31.951, 98.376, 220.605, 72.36, 67.547, 96.572, -44.463]

96.504