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: [62.856, 50.729, -49.536, -9.706, 9.94, 186.308, 37.126, 96.981, 242.019, 165.145]

79.186