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: [80.346, 228.37, 18.978, -42.02]

Output: 71.419


Input: Consider Input: [60.02, -66.628, -95.571, 114.26, 109.577, 141.08, 154.303, 228.454, 46.856, 7.365]

Output: 69.972


Input: Consider Input: [49.801, 237.667, 192.311, -37.263, 124.199]


Output: 113.343