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.

[222.94, 54.014, 232.208, -16.089, 214.915, 2.232]
118.37

[93.433, 148.366, 19.269]
87.023

[16.426, 100.384, 116.375, -85.793, 156.604, -61.217, 203.053, -97.468, -18.549]

36.646