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:
[29.292, 193.26, -48.646]

Ex Output:
57.969


Ex Input:
[-84.771, 60.727, 165.566, 27.782, 159.929, 167.451, -64.15]

Ex Output:
61.791


Ex Input:
[22.656, -87.751, 78.046]

Ex Output:

4.317