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: [65.591, -56.104, -28.389, -22.521]

Output: -10.356


Input: Consider Input: [-60.041, -56.779, 6.2, 73.114, 137.319]

Output: 19.963


Input: Consider Input: [-96.928, 56.862, 81.598, 99.958, 124.09]


Output: 53.116