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: [24.214, -38.12, -20.291, -25.889, 103.868, -26.712, -53.855, 42.555, -72.174, 166.651]

10.025