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: [182.852, 102.398, 200.428, -71.943, 50.578, -59.389, 0.465]

Output: 57.913

Input: Consider Input: [49.035, -81.115, 27.419]

Output: -1.554

Input: Consider Input: [-35.848, 83.31, 104.03, 96.421, 5.183, 158.877, 183.703, 118.274, 98.319]
Output: 90.252