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:
[39.88, 58.489, 225.343, 105.008, 210.581, 35.577]

Ex Output:
112.48


Ex Input:
[-72.554, 9.809, 27.09, 190.698]

Ex Output:
38.761


Ex Input:
[106.396, 20.655, 78.744, 111.906]

Ex Output:

79.425