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:
[118.319, 70.462]

Ex Output:
94.39


Ex Input:
[155.467, -40.717, -24.529, -22.608, 38.752]

Ex Output:
21.273


Ex Input:
[37.685, 173.291]

Ex Output:

105.488