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: [98.834, 143.231, 35.995, -64.696]

Output: 53.341


Input: Consider Input: [195.019, 144.893, 32.821, -21.855, 136.755]

Output: 97.527


Input: Consider Input: [17.74, 37.84]


Output: 27.79