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: [229.056, -39.647, 194.273, -55.955, 71.853, -87.782, 42.751, 130.696]

60.656