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:
[-78.906, 119.863, 44.561, 1.523]

Ex Output:
21.76


Ex Input:
[-46.14, -0.077, 72.663, 81.035, -24.144, 66.514, 98.199]

Ex Output:
35.436


Ex Input:
[17.853, -53.643, -51.456, 247.043, 152.446, 159.308]

Ex Output:

78.592


