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:
[128.152, 95.16, 70.113, -16.853]

Ex Output:
69.143


Ex Input:
[148.261, -51.308, -98.748, -41.832, 44.313, -41.042, -19.943]

Ex Output:
-8.614


Ex Input:
[67.194, 99.59, -3.321, 229.462, 150.176, -88.03]

Ex Output:

75.845