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:
[-2.425, -41.007, 142.975, 117.593, 142.875, -69.307, -38.932, 92.631, 158.921, 87.117]

Ex Output:
59.044


Ex Input:
[194.026, 179.483, 77.885, 111.339, 234.419, 138.685]

Ex Output:
155.973


Ex Input:
[-37.477, -71.737, 196.145]

Ex Output:

28.977