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: [139.608, 17.516, 100.5, -51.362, 57.462, -77.569, -95.41, -24.339, -96.579]

Output: -3.353


Input: Consider Input: [89.226, 241.396, 7.011, 114.867, 113.075, 103.559, 83.142, 188.743, -27.33, 180.773]

Output: 109.446


Input: Consider Input: [-89.96, 150.865, 149.644, 226.39, 106.098, 237.886, -71.247]


Output: 101.382