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:
[91.408, 178.508, 77.081, 13.419, 185.372, 158.828]

Ex Output:
117.436


Ex Input:
[-48.196, 15.566, 65.782, 174.566, -91.786, 52.379, 2.658, 76.856]

Ex Output:
30.978


Ex Input:
[60.37, 154.572, 207.762, 220.028, 56.028, -21.661]

Ex Output:

112.85