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: [4.435, 100.482, 125.267, -76.982, 9.994, 192.069, 54.099, -40.749]

46.077