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: [-98.361, -84.91]

Output: -91.636


Input: Consider Input: [140.332, 92.06]

Output: 116.196


Input: Consider Input: [237.967, 114.795, 36.104]


Output: 129.622