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: [-47.616, -60.048, 93.139, 189.224, 32.071, -92.293, 209.31, 116.618, 96.418]

59.647