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: [99.278, 72.353, -21.292]

Output: 50.113


Input: Consider Input: [-69.698, 181.415, -43.045, 160.857]

Output: 57.382


Input: Consider Input: [166.37, 129.717, 181.024, -64.757, 36.721, 48.388, 240.775, 59.551]


Output: 99.724


