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:
[127.522, 232.86, 46.593]

Ex Output:
135.658


Ex Input:
[-66.735, 23.822, -34.5, 118.327, 242.333]

Ex Output:
56.649


Ex Input:
[105.409, 210.43, 239.181, 147.134, 65.769, 128.913]

Ex Output:

149.473