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:
[93.405, -31.061]

Ex Output:
31.172


Ex Input:
[96.751, -19.713, 209.611, 175.81, 17.584, 195.179, -39.639, -80.064, 154.148, 176.935]

Ex Output:

88.66