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:
[126.136, -23.429, -25.125, -32.203, 36.405, 44.406, 147.828, -97.708, -69.793, 235.046]

Ex Output:
34.156


Ex Input:
[26.857, -69.553, -37.942]

Ex Output:
-26.879


Ex Input:
[230.635, -65.674, -79.203, -19.447, -43.36, 113.987]

Ex Output:

22.823