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:
[182.34, 105.105, 248.658, 104.174, -98.917, -47.707, -61.048, 241.903, -34.659, 31.89]

Ex Output:
67.174


Ex Input:
[-34.026, 86.773, 149.194, 228.14]

Ex Output:
107.52


Ex Input:
[178.561, 217.315, 224.614, 113.35, 98.987]

Ex Output:

166.565