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: [-44.977, 79.906, -20.036]

Output: 4.964


Input: Consider Input: [203.976, 106.117, 62.128, -89.428, 180.453, 155.566, 213.868]

Output: 118.954


Input: Consider Input: [-78.496, -66.346, 71.71]


Output: -24.377


