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:
[97.816, -78.424]

Ex Output:
9.696


Ex Input:
[102.553, 221.594, -69.406, 192.534, 139.703, -38.208, 228.963, 32.921]

Ex Output:
101.332


Ex Input:
[-11.831, -80.896]

Ex Output:

-46.364