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: [74.601, 131.018, -45.91]

Output: 53.236


Input: Consider Input: [176.928, 146.579, 134.498, 146.776]

Output: 151.195


Input: Consider Input: [-4.917, -23.241]


Output: -14.079