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:
[216.883, -37.346, 67.498, 41.686, 140.857, 195.57]

Ex Output:
104.191


Ex Input:
[70.496, 183.122, 75.017, -19.287, 53.364, -12.389, 249.47, -88.484, 249.98, 35.226]

Ex Output:
79.652


Ex Input:
[164.25, 170.676, 126.938, 102.143, -85.059, -6.895, 34.783]

Ex Output:

72.405