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.

[212.456, 6.972, -59.399, -83.342, 215.038, -97.851]
32.312

[-71.118, 160.927, 230.116, -26.655, -4.297, 64.272, 72.304, 41.517, 242.068]
78.793

[157.098, -74.567, 232.772, 8.253, -37.439, -50.382, 87.844, -33.038, 124.28]

46.091