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:
[113.238, 247.072, -31.448, -33.563, 74.519, 67.841]

Ex Output:
72.943


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

Ex Output:
120.736


Ex Input:
[47.595, -7.171, 4.333, 160.025, 152.275, 90.23, 128.643, 145.181]

Ex Output:

90.139