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

[93.405, -31.061]
31.172

[38.712, -36.822, -21.095, 62.066, 138.209, 122.548]

50.603