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: [114.823, 215.081, 143.2, 148.349, 239.654, 200.034, 96.055, -92.113, -38.088, 247.918]

127.491