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: [215.854, -43.532, 51.416]

Output: 74.579


Input: Consider Input: [73.603, -84.154, 222.739, 205.594, 215.842]

Output: 126.725


Input: Consider Input: [183.192, 226.177, 28.219, 208.805, 213.037, 139.24, -75.96, 109.596, 64.791, 158.8]


Output: 125.59