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.

[228.031, -85.617, 36.164]
59.526

[79.132, 226.507, 40.498, 100.658, 75.361]
104.431

[99.023, 80.055, 174.922, 70.864, 175.406, -92.344, 183.968, 50.342, -13.817]

80.935

