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: [1.222, 33.339, 163.969]

Output: 66.177


Input: Consider Input: [82.439, -85.167, 100.665, -83.297]

Output: 3.66


Input: Consider Input: [-9.354, 98.9, 60.569, -78.676, 31.088]


Output: 20.505