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: [-33.746, 231.27, 122.704, -25.907, -56.96]

Output: 47.472


Input: Consider Input: [135.575, 134.352, 209.54, 199.614, 87.027, 215.933, 49.266, 167.288, 164.589]

Output: 151.465


Input: Consider Input: [-43.374, 10.936]


Output: -16.219