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:
[112.026, 20.03, 73.595, -24.957, 185.718, 36.43, 206.024]

Ex Output:
86.981


Ex Input:
[-19.632, -75.567, 172.436, -73.584, 1.165]

Ex Output:

0.964