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:
[-17.604, 15.108, 34.328, -94.608]

Ex Output:
-15.694


Ex Input:
[-73.802, 167.727]

Ex Output:

46.962