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

Ex Output:
120.736


Ex Input:
[-27.872, -9.249, 218.646, -32.0, 49.715, 58.225, 118.489, 29.679, 31.407]

Ex Output:
48.56


Ex Input:
[245.222, 27.783, -34.384, 246.269, 117.859, 29.27, 160.8, 102.055]

Ex Output:

111.859