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: [-76.483, -8.26, 202.493, 21.071, 216.377, 114.082, 25.18, 196.896, 138.408, 235.872]

106.564