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:
[-30.66, 134.777, 39.637, -41.053, 60.502, -99.875, -32.055, 51.52, 216.645, 11.994]

Ex Output:
31.143


Ex Input:
[109.109, -95.395, 5.04, 45.497, 56.443, -72.916]

Ex Output:
7.963


Ex Input:
[211.961, 92.893, 239.509]

Ex Output:

181.454