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: [17.197, 152.985, 73.815]

Output: 81.332


Input: Consider Input: [214.036, 24.752, 106.748, 206.9, 42.432, 233.646]

Output: 138.086


Input: Consider Input: [83.797, 148.895, 11.724, 119.946, 160.112]


Output: 104.895