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: [199.153, 182.13, -7.832, -60.259]

Output: 78.298


Input: Consider Input: [-30.66, 134.777, 39.637, -41.053, 60.502, -99.875, -32.055, 51.52, 216.645, 11.994]

Output: 31.143


Input: Consider Input: [-66.669, -79.074, 31.177, 131.327, 45.026, -15.114, 146.428]


Output: 27.586