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: [17.197, 152.985, 73.815]

Output: 81.332


Input: Consider Input: [-12.392, 57.854, 59.291, -18.155, -94.56, 94.214, -38.912]

Output: 6.763


Input: Consider Input: [-25.148, 67.249, 58.27, -3.073]


Output: 24.325


