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: [138.602, 158.458, 241.327, 194.509, 169.45, -56.151]

Output: 141.032


Input: Consider Input: [207.804, 175.122, 13.63, 217.625, -98.484]

Output: 103.139


Input: Consider Input: [213.217, -36.92, 166.187, 199.664, 222.995, 60.119, 46.382, 6.489, 30.734]


Output: 100.985