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: [138.526, 60.81, 233.845, -33.602, 189.784, 13.888, 184.543, 53.635, 18.299, -87.132]

Output: 77.26


Input: Consider Input: [128.916, 203.766]

Output: 166.341


Input: Consider Input: [211.297, 221.106, 103.417, -98.483, -16.937, -69.537]


Output: 58.477