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:
[48.462, -80.347, -19.649, 180.664, -24.117]

Ex Output:
21.003


Ex Input:
[-56.201, -77.67, -75.53, -51.92, 146.416, 141.525]

Ex Output:
4.437


Ex Input:
[-37.027, -31.987, 45.761, -22.372, -67.476, -51.455, -43.713, 15.122, 229.536]

Ex Output:

4.043