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: [51.02, -71.125, 178.19, -7.234, -99.571, -17.215]

Output: 5.677


Input: Consider Input: [82.439, -85.167, 100.665, -83.297]

Output: 3.66


Input: Consider Input: [-18.081, 134.449, 122.338, 130.477]


Output: 92.296