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:
[211.292, 92.275, 128.423, 242.327, -54.053, 89.501, 64.784]

Ex Output:
110.65


Ex Input:
[236.959, 159.123, 17.257, 241.561, 119.782, -3.56, -30.957]

Ex Output:
105.738


Ex Input:
[173.758, 23.253, 84.353, 124.544, -62.561, 65.581]

Ex Output:

68.155


