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:
[-7.775, 55.997, 216.046]

Ex Output:
88.089


Ex Input:
[-27.734, -69.975, 242.123]

Ex Output:

48.138