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:
[195.019, 144.893, 32.821, -21.855, 136.755]

Ex Output:
97.527


Ex Input:
[38.343, 177.478, 120.174, -74.923, 98.159]

Ex Output:
71.846


Ex Input:
[-19.34, -22.776]

Ex Output:

-21.058


