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: [127.522, 232.86, 46.593]

Output: 135.658


Input: Consider Input: [159.965, 172.082]

Output: 166.024


Input: Consider Input: [130.208, 98.642, 161.154, -63.447]


Output: 81.639