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:
[-61.905, -98.66, 90.472, 237.317, 5.243, 196.933]

Ex Output:
61.567

Ex Input:
[182.852, 102.398, 200.428, -71.943, 50.578, -59.389, 0.465]

Ex Output:
57.913

Ex Input:
[-96.796, 127.634, 135.049, -55.677, 11.648, 72.63, 176.028, 48.486, 209.389, -13.558]

Ex Output:
61.483