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: [-47.149, 179.576, 213.872, 194.266, 224.544, 231.81, -58.978, -8.96]

116.123