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:
[192.74, 78.623, -5.937, 144.535]

Ex Output:
102.49


Ex Input:
[-33.746, 231.27, 122.704, -25.907, -56.96]

Ex Output:
47.472


Ex Input:
[89.281, 23.018, 168.604, -54.714, 84.437, 249.565, 8.148, -96.866, -65.843]

Ex Output:

45.07