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: [8.854, 74.189, 92.833, -33.086, -91.707, 67.05, 80.273, 24.698, 20.273, 33.304]

27.668