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: [219.336, -29.108, -41.612, 105.709]

Output: 63.581


Input: Consider Input: [-65.295, 113.842, -82.683, 235.996, 143.686, 31.127, 135.386, 217.657, -87.331]

Output: 71.376


Input: Consider Input: [128.008, 187.232, 160.214, 105.716, 127.264, 231.126, -40.425, 224.955, 28.983, 159.633]


Output: 131.271