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:
[41.081, 166.314, -14.556, -84.648, -8.286]

Ex Output:
19.981


Ex Input:
[-71.118, 160.927, 230.116, -26.655, -4.297, 64.272, 72.304, 41.517, 242.068]

Ex Output:
78.793


Ex Input:
[27.973, -54.446, -1.729, 137.326, -89.955, -57.231, 64.792, 127.163, 35.975, 227.486]

Ex Output:

41.735