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: [-55.198, 36.097, 190.132]

Output: 57.01


Input: Consider Input: [226.383, 37.978, 174.444, 117.212]

Output: 139.004


Input: Consider Input: [-12.925, -96.384, 21.438, -45.194]


Output: -33.266