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: [82.512, -17.775, 96.978, 48.868, 29.313, 190.187, 8.184, 197.455, 6.767, 201.929]

84.442