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: [-44.977, 79.906, -20.036]

Output: 4.964


Input: Consider Input: [130.57, 157.221, 228.177, 32.361, 166.457]

Output: 142.957


Input: Consider Input: [111.967, -82.897, 233.055]


Output: 87.375