Definition: 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: [165.855, -46.253, 33.638, 0.607, 115.867, -80.438, 44.832, 127.015, 204.325, 154.151]

71.96