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:
[-29.727, 150.587, -28.344, 181.096, 0.275, -91.658, 169.609, -21.106, 153.48]

Ex Output:
53.801


Ex Input:
[-3.857, -93.605, 43.857, -73.731, 84.094, -24.492, -41.811, 115.552, 231.429, 130.678]

Ex Output:
36.811


Ex Input:
[1.965, 6.414, 41.32, 83.709, 20.44, 152.32, 15.974, 240.85, 69.194]

Ex Output:

70.243