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.

[204.235, -53.675, 201.303, 20.869]
93.183

[-98.361, -84.91]
-91.636

[-1.327, 64.61, 41.579]

34.954