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: [26.857, -69.553, -37.942]

Output: -26.879


Input: Consider Input: [207.804, 175.122, 13.63, 217.625, -98.484]

Output: 103.139


Input: Consider Input: [-49.216, -80.047, 247.597, 163.066, -25.912, 69.21]


Output: 54.116