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:
[128.152, 95.16, 70.113, -16.853]

Ex Output:
69.143


Ex Input:
[54.908, 25.798]

Ex Output:
40.353


Ex Input:
[-82.501, -99.665, 133.336, 126.104, -12.653, -23.215, 127.87, 23.473]

Ex Output:

24.094