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: [246.735, -32.796, 24.225, 130.226, 154.003, 133.547, -69.625, 193.862, 198.93, 176.592]

115.57