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:
[-47.309, -46.076, 191.14, -6.032, 4.858]

Ex Output:
19.316


Ex Input:
[15.748, -13.369, -79.943, -2.78, 169.174, 101.44, -84.923, 189.589, 83.541, -37.629]

Ex Output:
34.085


Ex Input:
[120.0, -76.917]

Ex Output:

21.542