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: [-81.432, -63.059, 150.144, 55.203, 215.405, -89.797, 72.946]

Output: 37.059


Input: Consider Input: [171.805, 71.031, 36.192, 28.948, -58.045, 53.843]

Output: 50.629


Input: Consider Input: [-39.045, 1.655, 183.799, -30.501]


Output: 28.977