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: [104.54, 70.777, 51.879, 161.253, 58.991, 177.564, -3.982, 115.444]

92.058