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: [59.251, 198.593]

Output: 128.922


Input: Consider Input: [227.404, 94.456, 233.241, 147.762, -31.667, -62.22, -93.912]

Output: 73.581


Input: Consider Input: [162.136, -83.28]


Output: 39.428