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:
[169.922, 249.47, 142.453, -55.768, 155.357, 6.096, -95.702, 243.569, 31.11, -75.031]

Ex Output:
77.148


Ex Input:
[-11.211, 9.955, 208.942, 124.097, 118.282, 65.001]

Ex Output:
85.844


Ex Input:
[205.777, 186.173, 208.307, 235.504, 98.185, 154.014, 248.815, 153.146]

Ex Output:

186.24