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: [163.343, 9.145, 159.333, 61.419, 88.638, 113.362, -61.247, 89.97]

77.995