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: [61.931, -94.172, -65.103, -27.81, 162.59, 113.736, 120.562, 226.794, 75.363, 222.784]

79.668