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:
[-32.557, -70.922, 191.786, 244.222]

Ex Output:
83.132


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:
[162.385, 90.784, 137.875, 141.499, 179.335, 174.937, -63.078, 225.585, -16.753, -27.884]

Ex Output:

100.469