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: [84.13, 59.186, 115.606]

Output: 86.307


Input: Consider Input: [-14.826, 211.373]


Output: 98.274