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: [171.439, 0.981, 42.253, 239.995, 129.938, -67.125, -69.565, -53.374, -51.357]

Output: 38.132


Input: Consider Input: [156.41, 19.521, 110.08, -59.009, 49.787, 243.748, -25.285, -71.104, 131.859, -70.207]

Output: 48.58


Input: Consider Input: [65.996, -85.885, 34.395, 55.128, 216.067, -4.933, -30.061, -57.437, 142.772]


Output: 37.338