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: [229.28, 202.632, 129.717, 211.459, 203.204]

Output: 195.258


Input: Consider Input: [131.164, 99.999, 138.488, 57.264, -40.069, -82.402, -42.836]

Output: 37.373


Input: Consider Input: [-73.228, 3.718]


Output: -34.755


