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:
[211.927, 190.941, -74.44, 7.991, -80.894, 48.291, 127.383, -51.774]

Ex Output:
47.428


Ex Input:
[-42.956, 89.597, -60.477, 101.972, 77.479]

Ex Output:
33.123


Ex Input:
[139.403, 233.169, -17.693, 199.427, -99.781, 227.084]

Ex Output:

113.602