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:
[-66.387, 135.639, 182.921, 175.573, 105.67, -29.751, 156.67, 83.119, 19.538]

Ex Output:
84.777


Ex Input:
[93.72, 13.366, -44.452, -29.011, 56.593, 5.272, -20.162, 160.282, 44.017]

Ex Output:
31.069


Ex Input:
[24.214, -38.12, -20.291, -25.889, 103.868, -26.712, -53.855, 42.555, -72.174, 166.651]

Ex Output:

10.025