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: [-55.711, 55.72, 40.975, 209.662, -74.651, 125.271, 36.67, -2.016]

41.99