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: [159.965, 172.082]

Output: 166.024


Input: Consider Input: [-1.833, 218.553, -61.132, -19.027, 87.034]

Output: 44.719


Input: Consider Input: [-71.994, 198.302, 185.206, 247.465, -4.328, -47.474, -94.828]


Output: 58.907