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: [-19.26, 130.53, 225.367, 179.475, -63.39]

Output: 90.544


Input: Consider Input: [128.916, 203.766]

Output: 166.341


Input: Consider Input: [79.329, -74.044, 115.238, 117.905, -62.622, 59.227, 52.75]


Output: 41.112