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:
[192.529, -67.249, 123.707, 41.987, 11.587, 202.189, 12.989]

Ex Output:
73.963


Ex Input:
[21.659, 63.646, -97.361]

Ex Output:
-4.019


Ex Input:
[-6.743, 139.794]

Ex Output:

66.526