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: [199.874, -45.634, -39.343, 75.985, 143.35, 87.15, 120.645, -34.636, 159.567]

Output: 74.106


Input: Consider Input: [74.43, 138.738, 114.237, 138.845, 188.957, 103.103, -43.988, -68.085, 157.274]

Output: 89.279


Input: Consider Input: [168.495, -45.259, 233.021, 210.029, -68.468, 222.516, 115.562, 182.961, 228.467, 54.633]


Output: 130.196