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: [-6.992, -36.177, -95.203, 87.142]

Output: -12.808


Input: Consider Input: [234.404, 162.933, 178.375, 10.683, 181.727, -50.587, 169.507, -72.896, 168.06, 238.363]

Output: 122.057


Input: Consider Input: [-75.39, 153.728, -24.068, 186.496, 127.642, 27.701, 178.912, 10.982, -94.437, 35.731]


Output: 52.73