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:
[53.391, 118.782, 102.742]

Ex Output:
91.638


Ex Input:
[159.291, 160.61, -50.992, 34.053, 78.883, 222.627, 105.95]

Ex Output:
101.489


Ex Input:
[246.816, 165.531, 73.734, 9.635, 157.635, 246.016, 160.622, 173.394]

Ex Output:

154.173