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.

[227.601, -61.961, 78.822, -29.52, 126.039, -44.098, 112.374, -19.23, 69.758]
51.087

[224.567, -42.213, 232.017]
138.124

[47.085, -20.927, -10.587, 232.022, 155.57, 226.624, 128.252, 116.545, -92.461]

86.903

