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: [-6.648, 235.825, 71.3, 74.263, 36.113, 50.775, 55.119, 223.542]

92.536