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:
[88.77, 109.102, -86.446, 207.301, 160.91, -12.956]

Ex Output:
77.78


Ex Input:
[139.608, 17.516, 100.5, -51.362, 57.462, -77.569, -95.41, -24.339, -96.579]

Ex Output:
-3.353


Ex Input:
[235.869, 46.447]

Ex Output:

141.158