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: [-48.765, 186.301, 26.635, 208.904, -9.624, 182.277, 124.366, -54.983]

76.889