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: [161.683, 162.041, 187.429, -79.681, 60.809, 225.806]

Output: 119.681


Input: Consider Input: [189.509, 2.559, 70.487, 123.78, -29.282, -71.938]


Output: 47.519