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: [199.153, 182.13, -7.832, -60.259]

Output: 78.298


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: [-30.77, 228.314, 131.048, 202.916]


Output: 132.877