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:
[-92.0, 108.814, 164.207, 94.26, 33.74]

Ex Output:
61.804


Ex Input:
[233.742, -71.075]

Ex Output:
81.333


Ex Input:
[90.803, 72.482, -65.905, 19.04, -58.205, -16.824]

Ex Output:

6.898