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:
[65.591, -56.104, -28.389, -22.521]

Ex Output:
-10.356


Ex Input:
[185.43, -65.359, -83.971, 30.359, -1.788, 181.168, 210.362, -90.041, -26.224, 239.651]

Ex Output:
57.959


Ex Input:
[38.946, 240.592, 26.691, -5.444, -13.63, -62.499, -72.937, 24.035, 198.963, 70.323]

Ex Output:

44.504