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:
[80.113, -28.006, -40.254, 222.454, 29.784, 129.871, 141.71, -44.716, -22.74]

Ex Output:
52.024


Ex Input:
[76.889, 179.836, 105.364]

Ex Output:
120.696


Ex Input:
[28.665, 112.251, 108.523, 90.44, 113.515, 67.927, -35.541, 58.205]

Ex Output:

67.998