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: [219.336, -29.108, -41.612, 105.709]

Output: 63.581


Input: Consider Input: [21.531, 221.161, -31.194]

Output: 70.499


Input: Consider Input: [55.974, 24.673, 167.638]


Output: 82.762