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: [-40.246, -7.512, 174.245, -98.6]

Output: 6.972


Input: Consider Input: [29.292, 193.26, -48.646]

Output: 57.969


Input: Consider Input: [-48.267, 51.601, 187.641, 143.454, 222.746, 147.612, 39.615]


Output: 106.343