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: [131.164, 99.999, 138.488, 57.264, -40.069, -82.402, -42.836]

Output: 37.373


Input: Consider Input: [-73.074, 87.743, 221.875, 126.604, 31.513, 196.863]

Output: 98.587


Input: Consider Input: [56.177, 238.37, 30.0, -90.844]


Output: 58.426