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:
[85.011, -20.439, 195.195, 114.286]

Ex Output:
93.513


Ex Input:
[147.664, 167.561, 244.106, -42.988, 9.425, 79.806, 239.58]

Ex Output:
120.736


Ex Input:
[-71.113, -89.349, 160.103, -23.041, 36.969, 179.61, 69.819, 55.626]

Ex Output:

39.828