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: [72.755, 233.932, 245.785, 92.401]

Output: 161.218


Input: Consider Input: [99.278, 72.353, -21.292]

Output: 50.113


Input: Consider Input: [71.39, 133.73, -86.265, 237.963, 228.337, 220.263, 127.766, 174.117]


Output: 138.413


