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:
[166.967, 154.381, -19.741, 157.124]

Ex Output:
114.683


Ex Input:
[41.212, 221.072, 226.666, 3.688, 180.239, 142.767, 184.012, 63.249]

Ex Output:
132.863


Ex Input:
[138.153, 51.567, -73.614]

Ex Output:

38.702