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.

Ex Input:
[11.642, -39.595, 23.351, 168.447, 244.85, 108.958, 80.422, -14.774, 138.977]

Ex Output:
80.253


Ex Input:
[-92.167, -67.984, -31.831, -21.057, 101.792, 114.116, 185.901, -25.874]

Ex Output:
20.362


Ex Input:
[16.802, 226.182, 91.395]

Ex Output:

111.46