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: [120.236, 116.311, -13.268]

Output: 74.426


Input: Consider Input: [20.286, 145.152, -35.156, 177.192, -61.967, -25.578]


Output: 36.655