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: [127.245, 216.32, 240.025, 219.568, -77.603, 104.055, 197.515, 165.861, 191.504, 24.445]

140.893