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: [1.222, 33.339, 163.969]

Output: 66.177


Input: Consider Input: [178.031, -52.967, 31.914, 174.681, 155.375, -3.831, 165.333, 10.246, -14.468]

Output: 71.59


Input: Consider Input: [-33.193, 219.377, -87.676, -15.991, 149.746, 228.558, 94.115, -94.075, -60.86, 0.108]


Output: 40.011