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: [110.671, -22.006, 168.421, 152.718, 116.702, -26.669, -55.023, -72.932]

46.485