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.

[39.88, 58.489, 225.343, 105.008, 210.581, 35.577]
112.48

[-94.649, -47.045, 244.483, 5.338, 243.43, -3.442, 16.366]
52.069

[171.618, -42.977, -16.666, -96.964, 31.352]

9.273