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:
[203.498, -79.59, -73.767, -65.942, -8.693]

Ex Output:
-4.899


Ex Input:
[-55.198, 36.097, 190.132]

Ex Output:
57.01


Ex Input:
[-39.873, 97.835, 55.039, -52.237]

Ex Output:

15.191