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: [-75.664, 192.225, 2.107, -86.22, -51.11]

Output: -3.732


Input: Consider Input: [125.67, 5.514, 161.93, 107.05, 118.949, 233.815, 230.211]

Output: 140.448


Input: Consider Input: [185.849, 12.232, -37.465]


Output: 53.539