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:
[179.929, 180.162, -63.896, -56.366, 233.638]

Ex Output:
94.693


Ex Input:
[-81.785, -44.121]

Ex Output:
-62.953


Ex Input:
[12.253, 159.462, -79.279, 148.184, -64.425, 125.648, -87.071]

Ex Output:

30.682


