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: [174.928, 23.598, 162.162, -8.708, -15.016, 6.279, 185.501, 178.755]

88.437