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.

[-66.387, 135.639, 182.921, 175.573, 105.67, -29.751, 156.67, 83.119, 19.538]
84.777

[179.144, 114.883, -6.86, 137.104, 4.024, 55.61, 169.274, -60.246, 66.322, -92.91]
56.634

[232.39, 28.124, 179.446, 228.788, 90.985, 60.823, 92.908]

130.495