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: [-31.252, 246.934, 96.512, 19.356, -50.759, 134.528, 176.914, 17.007, 171.802]

Output: 86.782


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

Output: 141.032


Input: Consider Input: [112.141, 221.013, 75.929, -19.73, 151.257]


Output: 108.122