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:
[245.466, 19.262, 199.878]

Ex Output:
154.869


Ex Input:
[70.496, 183.122, 75.017, -19.287, 53.364, -12.389, 249.47, -88.484, 249.98, 35.226]

Ex Output:
79.652


Ex Input:
[33.19, 186.078, 118.231, 102.095, 99.666, 183.622]

Ex Output:

120.48