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: [93.433, 148.366, 19.269]

Output: 87.023


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

Output: 17.329


Input: Consider Input: [39.224, 123.622, 144.476, -19.599]


Output: 71.931