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: [91.408, 178.508, 77.081, 13.419, 185.372, 158.828]

Output: 117.436


Input: Consider Input: [120.236, 116.311, -13.268]

Output: 74.426


Input: Consider Input: [13.444, 219.598, 148.905]


Output: 127.316