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: [57.948, 220.872, 208.084, 98.262, -96.056, -96.647, 55.855, 10.279, 224.097]

75.855