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: [166.029, -82.901, 110.004, 224.045, 176.063, 64.636, 135.812, 44.925, 137.313]

108.436