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:
[59.291, 108.572, 120.13]

Ex Output:
95.998


Ex Input:
[-15.843, 236.17, -79.922, -29.879]

Ex Output:
27.632


Ex Input:
[73.458, -17.127]

Ex Output:

28.166