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: [49.279, 233.494, 143.952, 172.033, 89.735, 10.91, 189.447, 156.855]

130.713