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.

[218.807, 72.849, 7.838, 124.81, 45.929, 239.888]
118.354

[-1.833, 218.553, -61.132, -19.027, 87.034]
44.719

[216.843, 82.181, 21.409]

106.811