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: [-65.295, 113.842, -82.683, 235.996, 143.686, 31.127, 135.386, 217.657, -87.331]

Output: 71.376


Input: Consider Input: [112.53, -67.079, 177.313, 230.482, 57.316, -37.564]

Output: 78.833


Input: Consider Input: [154.797, 166.764]


Output: 160.781