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:
[89.226, 241.396, 7.011, 114.867, 113.075, 103.559, 83.142, 188.743, -27.33, 180.773]

Ex Output:
109.446


Ex Input:
[21.007, 48.739, -49.831, -22.699]

Ex Output:
-0.696


Ex Input:
[-94.823, 145.396, -61.919, 174.283, 60.137, 50.828, 171.822]

Ex Output:

63.675