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: [-96.502, 12.006]

Output: -42.248


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

Output: 96.398


Input: Consider Input: [159.243, 17.964, 13.543, 175.402, -52.441, -34.741, 158.461]


Output: 62.49