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:
[199.153, 182.13, -7.832, -60.259]

Ex Output:
78.298


Ex Input:
[113.021, 101.946, -14.79, -8.555, -59.095, -74.169, 80.193, 157.87, 26.321, -19.87]

Ex Output:
30.287


Ex Input:
[-1.794, 20.868, -98.98, 76.164, 5.808, -59.338, -76.515, -90.202, -77.626, 150.554]

Ex Output:

-15.106