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: [-40.509, 201.39]

Output: 80.44


Input: Consider Input: [-95.427, -98.447]

Output: -96.937


Input: Consider Input: [-10.284, 29.323, 129.426, 159.127, 118.615, 104.019]


Output: 88.371


