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:
[-57.148, -59.655, 208.462, 223.004, 100.684, 188.569]

Ex Output:
100.653


Ex Input:
[179.144, 114.883, -6.86, 137.104, 4.024, 55.61, 169.274, -60.246, 66.322, -92.91]

Ex Output:
56.634


Ex Input:
[-38.699, 16.918, -67.005]

Ex Output:

-29.595