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: [-77.226, 44.49]

Output: -16.368


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

Output: 107.52


Input: Consider Input: [-57.148, -59.655, 208.462, 223.004, 100.684, 188.569]


Output: 100.653