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: [207.449, 85.584, -55.048, -10.53, 30.755]

Output: 51.642


Input: Consider Input: [-17.026, 165.89]

Output: 74.432


Input: Consider Input: [81.485, -64.06, 103.067]


Output: 40.164