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.

[247.332, 97.053, 43.697, 51.168, -56.25, 163.444]
91.074

[75.879, 43.123]
59.501

[140.861, 209.116, 188.856, 57.166, 215.944, 171.017, -44.315]

134.092