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.

Example input: [1,3,5]
Example output: 3.000
Example explanation: The mean of the input list is (1+3+5)/3, which equals 3. This is a good example.
Q: [222.437, 198.009, 41.408, 47.695, 228.724, -22.472, 159.11, 39.423]
A:
114.292