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: [-82.094, 163.171, -35.384, 69.572]

Output: 28.816


Input: Consider Input: [87.234, -30.861, 221.46, 120.15, -85.065, 67.024, 144.174, -64.546]

Output: 57.446


Input: Consider Input: [18.777, 240.912, 100.334]


Output: 120.008