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: [14.714, 193.877, 59.698, 207.719, 48.002, 115.721, 240.783, -11.255, 184.37]

117.07