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: [51.133, -97.09, -84.103, 153.976, 102.201, 236.147, 157.731, -3.464, 170.271, 112.312]

79.911