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: [183.243, 56.124, 69.958, 141.219, -24.41, 126.355, -33.45, 102.279]

77.665