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: [96.09, 120.677, 213.231, 95.663, 212.515, 105.979, -97.579]

106.654