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: [191.796, 24.742, 60.847, -55.812, -15.205, 210.884, 5.463, 84.361]

63.384