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: [226.383, 37.978, 174.444, 117.212]

Output: 139.004


Input: Consider Input: [-34.026, 86.773, 149.194, 228.14]

Output: 107.52


Input: Consider Input: [245.553, -35.015, -77.126]


Output: 44.471