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: [217.978, 70.977, 31.129, -87.408, -99.013, 249.862, -87.151, 207.527, 43.432]

Output: 60.815


Input: Consider Input: [199.974, 2.205, 197.996, 172.426, 182.153, 42.045, 53.238, 18.021, 83.903]

Output: 105.773


Input: Consider Input: [236.145, 2.261, -65.81, 165.401, 176.736, 199.472, 37.829, 141.305, 207.147]


Output: 122.276