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: [42.599, 243.483, 230.824, -47.984, -99.619, 79.861, 143.785, 144.058]

92.126