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:
[135.962, 136.509, 77.88, 148.448]

Ex Output:
124.7


Ex Input:
[45.112, 147.024, -15.583, 33.655, -60.031]

Ex Output:
30.035


Ex Input:
[188.531, 203.662, -68.638]

Ex Output:

107.852