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: [234.731, 162.689, 2.171, 126.921, 19.576, -48.613, 219.218, 114.533]

103.903