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:
[233.742, -71.075]

Ex Output:
81.333


Ex Input:
[41.308, 149.33, -33.086, -10.268, 209.148, -69.203, -68.646, -82.073, 83.754]

Ex Output:
24.474


Ex Input:
[14.622, 109.042, 102.411]

Ex Output:

75.358


