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: [22.811, -95.531, -79.835, 154.93, 172.002, 175.679, 94.874, 112.721]

69.706