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: [57.478, 212.225, -90.816, -10.092, 238.514, 60.36, 59.627]

Output: 75.328


Input: Consider Input: [150.321, 169.658, 221.448, 54.785, 160.245, 9.534, 78.865, 229.753, 225.969]

Output: 144.509


Input: Consider Input: [-87.756, -6.861, -76.597, -54.404, 75.598, 107.33]


Output: -7.115