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: [159.843, 97.236, 57.934, 180.847, -81.322, 94.73, 61.821, 211.031]

97.765