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.

[3.556, 65.177]
34.366

[11.642, -39.595, 23.351, 168.447, 244.85, 108.958, 80.422, -14.774, 138.977]
80.253

[34.546, 60.172]

47.359