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: [171.439, 0.981, 42.253, 239.995, 129.938, -67.125, -69.565, -53.374, -51.357]

Output: 38.132


Input: Consider Input: [112.141, 221.013, 75.929, -19.73, 151.257]

Output: 108.122


Input: Consider Input: [4.808, 205.011, 171.006, -83.794, 174.586, 239.34, -47.787, 15.572, 66.299]


Output: 82.782