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: [41.355, 40.781, 82.879, 46.967, -3.798, 185.685, 91.083, 162.824]

80.972