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: [-76.519, -96.704, 45.765, -80.415, 43.483, 138.834, 8.465, 182.381, -22.006]

15.92