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:
[162.434, 99.656, 86.665, 13.03, 99.225, 43.608, -41.822, 206.671]

Ex Output:
83.683


Ex Input:
[-3.857, -93.605, 43.857, -73.731, 84.094, -24.492, -41.811, 115.552, 231.429, 130.678]

Ex Output:
36.811


Ex Input:
[198.115, 225.802, 195.016]

Ex Output:

206.311