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: [-95.427, -98.447]

Output: -96.937


Input: Consider Input: [38.343, 177.478, 120.174, -74.923, 98.159]

Output: 71.846


Input: Consider Input: [155.467, -40.717, -24.529, -22.608, 38.752]


Output: 21.273