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: [-67.542, 65.934, 223.305, 25.694, 159.037]

Output: 81.286


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

Output: 17.329


Input: Consider Input: [172.217, -19.084, 177.99, 117.569, 236.609, -18.496]


Output: 111.134