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: [151.151, 144.049, 217.252]

Output: 170.817


Input: Consider Input: [-51.603, 117.351, -67.451, 218.664, 68.981, 167.005, -53.851, 104.996]

Output: 63.012


Input: Consider Input: [140.203, -92.781, -58.882, 157.543, 67.852]


Output: 42.787