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.

[126.198, -70.303]
27.947

[125.987, 140.164, 103.07, -78.923, -92.734, -96.888]
16.779

[55.803, 91.52]

73.661