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:
[198.323, 108.702, 38.704, -8.85, 57.749, 108.604, -20.56, 229.826, -85.953, 177.128]

Ex Output:
80.367


Ex Input:
[80.346, 228.37, 18.978, -42.02]

Ex Output:
71.419


Ex Input:
[118.554, 176.562, 33.122, 128.62, -40.387, 130.134, -95.38, 88.282, 179.758]

Ex Output:

79.918