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:
[-95.427, -98.447]

Ex Output:
-96.937


Ex Input:
[48.462, -80.347, -19.649, 180.664, -24.117]

Ex Output:
21.003


Ex Input:
[166.127, -53.754]

Ex Output:

56.187