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:
[110.671, -22.006, 168.421, 152.718, 116.702, -26.669, -55.023, -72.932]

Ex Output:
46.485


Ex Input:
[159.381, -84.046]

Ex Output:
37.668


Ex Input:
[87.789, -11.945, 155.115, 81.856, -73.176, 64.915]

Ex Output:

50.759