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.

[123.511, 37.811, 249.595, -25.324]
96.398

[79.04, 110.342, 208.846, 132.702, 48.832, -81.929]
82.972

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

36.646

