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: [-44.213, 196.854, 168.799, -98.973, 7.243, 90.052, 31.508, 122.211, 3.795, 108.269]

58.555