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: [57.506, 172.357, 191.473, 131.849]

Output: 138.296


Input: Consider Input: [118.319, 70.462]

Output: 94.39


Input: Consider Input: [236.529, 167.706, 180.117, 175.296, -25.003, 5.091]


Output: 123.289