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: [147.614, 38.202, 234.736, 50.813, 106.808, -63.052, -92.199, -3.44, 85.636]

56.124