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:
[-79.521, 169.962, 120.036, -71.612, -53.261, -90.734, -35.559, 140.419, 25.016]

Ex Output:
13.861


Ex Input:
[87.02, -25.654, -67.979, 52.368, 20.078, 160.939, 4.162, 205.092, -57.092, -68.35]

Ex Output:
31.058


Ex Input:
[121.069, 12.661, 159.825, -39.645, 6.609, 156.735, 110.054, 112.875]

Ex Output:

80.023