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:
[9.392, -80.549]

Ex Output:
-35.579


Ex Input:
[172.084, 126.948, 90.757]

Ex Output:
129.93


Ex Input:
[-21.466, 88.563]

Ex Output:

33.549