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.

[181.256, -78.191, 162.427, -90.527, 123.709, 248.073]
91.124

[98.834, 143.231, 35.995, -64.696]
53.341

[155.527, 230.296, 22.062, 210.181, 42.788, -92.124]

94.788