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: [79.713, 76.028, -73.609, -58.23, 127.184, 152.619, -78.16, 246.662, -77.533]

43.853