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:
[-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:
[1.222, 33.339, 163.969]

Ex Output:
66.177


Ex Input:
[23.061, 0.487, -96.305, 212.958, 239.121, 149.408, 85.691]

Ex Output:

87.774