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: [181.727, -84.77, 104.286, 137.156, 108.769, 42.211, -49.786, -57.224]

47.796