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:
[216.087, 41.07, 213.683, 53.822, 31.214]

Ex Output:
111.175


Ex Input:
[-61.563, 49.659, 125.562, 130.542, 75.232, 197.442, 175.182, 54.736, 210.833, 65.27]

Ex Output:
102.289


Ex Input:
[-61.761, -14.678]

Ex Output:

-38.22