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: [-46.917, 158.385, -7.145, 98.562, 156.985, 52.095, 130.667, -62.223]

60.051