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: [1.435, 246.462, 5.433, -3.093, 31.948, 113.344, 41.816, 43.437, -93.129, 116.292]

Output: 50.395

Input: Consider Input: [-90.211, -60.08, 99.87, 18.704, 197.269, 173.722, 168.875]

Output: 72.593

Input: Consider Input: [158.197, 125.394, 249.532, 145.426, -38.449, -55.294, 24.725, 78.56, 180.519]
Output: 96.512