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: [-17.604, 15.108, 34.328, -94.608]

Output: -15.694


Input: Consider Input: [140.332, 92.06]

Output: 116.196


Input: Consider Input: [85.248, -90.231, -58.62, 89.091, 140.072, -5.453, -94.489]


Output: 9.374