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: [-19.769, 147.929, -36.133, 201.287, 28.528, -6.089, 122.533, 127.892, -36.662]

Output: 58.835


Input: Consider Input: [227.404, 94.456, 233.241, 147.762, -31.667, -62.22, -93.912]

Output: 73.581


Input: Consider Input: [17.197, 152.985, 73.815]


Output: 81.332