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: [12.155, 204.528, 85.84, 66.186]

Output: 92.177


Input: Consider Input: [-9.301, -10.629, 88.777, 68.965]

Output: 34.453


Input: Consider Input: [107.711, 223.387, 231.078]


Output: 187.392


