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:
[79.132, 226.507, 40.498, 100.658, 75.361]

Ex Output:
104.431


Ex Input:
[224.567, -42.213, 232.017]

Ex Output:
138.124


Ex Input:
[38.4, 51.568, 111.387]

Ex Output:

67.118