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:
[224.131, -2.975, 101.116, 127.048, -67.279, -25.825, 136.475, -51.855, 117.178, 219.264]

Ex Output:
77.728


Ex Input:
[49.035, -81.115, 27.419]

Ex Output:
-1.554


Ex Input:
[40.092, 39.738]

Ex Output:

39.915