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: [194.829, 171.604, 202.915, 181.243, 32.746, 103.499, 121.571, 20.791, 87.944, -60.637]

105.65