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: [87.258, 29.558, -48.199, -28.615, 46.642]

Output: 17.329


Input: Consider Input: [149.451, 230.29, 56.327, -72.328, -73.276, -90.669, 206.191, 87.481]

Output: 61.683


Input: Consider Input: [160.202, 88.34, -78.994]


Output: 56.516