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:
[14.818, 98.871, -79.033]

Ex Output:
11.552


Ex Input:
[41.081, 166.314, -14.556, -84.648, -8.286]

Ex Output:
19.981


Ex Input:
[-70.607, 41.066, 49.614, 153.242, 247.484, 218.658, -64.966, 210.487, 218.364, -76.468]

Ex Output:

92.687