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.

[230.375, -45.327, 112.137, 109.305]
101.622

[219.769, -36.26, 3.121, -22.5, 124.372]
57.7

[12.253, 159.462, -79.279, 148.184, -64.425, 125.648, -87.071]

30.682