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: [133.812, 168.822, 194.477, -28.147, -50.284, -66.742, -41.716, -98.388]

26.479