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: [53.271, 224.646, -66.568, -23.058, -60.09, 178.437, -70.082, 131.116]

45.959