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: [224.557, 29.245, 110.233, 34.667, 210.584, 162.813, -56.813, 111.751]

103.38