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:
[231.057, 71.527, 201.799, -5.17, -14.963, -35.693]

Ex Output:
74.76


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:
[133.842, 101.473, 152.47, -21.724, 61.343, -38.845, 138.237, -35.055, 76.845]

Ex Output:

63.176