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: [129.453, 232.284, -34.595]

Output: 109.047


Input: Consider Input: [192.74, 78.623, -5.937, 144.535]

Output: 102.49


Input: Consider Input: [-14.651, 67.293]


Output: 26.321