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: [155.467, -40.717, -24.529, -22.608, 38.752]

Output: 21.273


Input: Consider Input: [73.331, 85.459, 59.798, -35.019]

Output: 45.892


Input: Consider Input: [117.527, -43.288, 131.454, 144.37]


Output: 87.516