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: [245.271, 40.965, 133.913, 212.104]

Output: 158.063


Input: Consider Input: [-66.387, 135.639, 182.921, 175.573, 105.67, -29.751, 156.67, 83.119, 19.538]

Output: 84.777


Input: Consider Input: [68.917, 24.2, -79.923, 72.791, -85.781, 45.312, 228.983, 9.727, 2.077]


Output: 31.811