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:
[-2.772, 225.483, 211.749, 45.779, -82.623, 229.799, 107.783, 64.653]

Ex Output:
99.981


Ex Input:
[-28.982, -63.182, 22.408, 30.425, 125.743, 16.816, 96.711, 215.027, 32.552]

Ex Output:
49.724


Ex Input:
[128.973, 36.8]

Ex Output:

82.887