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: [58.371, 4.131]

Output: 31.251


Input: Consider Input: [54.715, 180.963, 239.308, 175.084, 147.044, 136.262, 184.009]

Output: 159.626


Input: Consider Input: [123.511, 37.811, 249.595, -25.324]


Output: 96.398


