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: [237.493, 242.837, -40.238, -67.494, -33.537, 180.7, -5.818, 105.014, 63.452, 146.061]

82.847