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:
[49.035, -81.115, 27.419]

Ex Output:
-1.554


Ex Input:
[-24.069, 49.942, -56.199, 147.337, 81.429, 198.62, -91.886, 33.842, -16.712, -51.661]

Ex Output:
27.064


Ex Input:
[20.191, -54.91, 19.381, -4.587, -31.613, -11.765, 198.59, 101.529]

Ex Output:

29.602