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: [51.372, 141.276, 8.131, 168.539, 151.323]

Output: 104.128


Input: Consider Input: [21.659, 63.646, -97.361]

Output: -4.019


Input: Consider Input: [140.849, 113.06, 64.078, 194.793, -43.06, -28.691, 63.977]


Output: 72.144