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:
[185.43, -65.359, -83.971, 30.359, -1.788, 181.168, 210.362, -90.041, -26.224, 239.651]

Ex Output:
57.959


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:
[-95.413, 56.579, -14.016, 236.999, -2.36, 173.346, 139.982]

Ex Output:

70.731