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.

[-17.106, 23.8, -54.195, 233.82, -99.732, -68.488, 215.616]
33.388

[187.54, -56.697, 55.301, 235.071, 176.682, 103.554, -35.29, 84.215]
93.797

[78.368, 216.787, -96.687, 81.728, 119.928, 49.546, 155.834, -96.513]

63.624