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:
[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:
[73.331, 85.459, 59.798, -35.019]

Ex Output:
45.892


Ex Input:
[145.159, -40.366, -43.71, 249.425]

Ex Output:

77.627