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: [155.467, -40.717, -24.529, -22.608, 38.752]

Output: 21.273


Input: Consider Input: [219.428, 229.08, 24.616, -83.165, -28.839, 195.219, 170.491, -78.673]

Output: 81.02


Input: Consider Input: [159.818, -89.589, 152.855, -84.473, 171.06]


Output: 61.934


