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: [-33.193, 219.377, -87.676, -15.991, 149.746, 228.558, 94.115, -94.075, -60.86, 0.108]

40.011