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: [41.247, -77.975, 218.04, 100.967, 58.151, 222.332, -51.194, 68.503]

72.509