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: [217.523, 92.701, -55.65, -89.359, 55.742, 158.634, -31.883, 206.554]

Output: 69.283


Input: Consider Input: [-55.198, 36.097, 190.132]

Output: 57.01


Input: Consider Input: [-71.118, 160.927, 230.116, -26.655, -4.297, 64.272, 72.304, 41.517, 242.068]


Output: 78.793