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: [-81.785, -44.121]

Output: -62.953


Input: Consider Input: [230.375, -45.327, 112.137, 109.305]

Output: 101.622


Input: Consider Input: [161.719, 190.202, -29.327, 106.791, 116.192, 138.531, 20.151, -20.543, 28.529, -21.501]


Output: 69.074