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:
[-6.099, 142.31]

Ex Output:
68.106


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

Ex Output:
46.485


Ex Input:
[211.062, 164.38, 33.854, 96.053, -41.146, -87.62, 135.914]

Ex Output:

73.214