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: [140.924, 212.912, 8.74, 137.912, -84.972, -33.58, -49.922, -41.534]

36.31