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:
[82.748, 43.804, -13.469, 226.705, -7.478]

Ex Output:
66.462


Ex Input:
[202.411, 127.775, 165.721, -41.545, 113.127, 229.974, 111.13, 208.686, 92.744, 36.522]

Ex Output:
124.654


Ex Input:
[86.217, 14.473, 153.852]

Ex Output:

84.847