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.

Input: Consider Input: [66.666, -70.196, -39.152]

Output: -14.227


Input: Consider Input: [82.748, 43.804, -13.469, 226.705, -7.478]

Output: 66.462


Input: Consider Input: [116.483, -59.476, 69.652]


Output: 42.22