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.

[225.697, 75.029]
150.363

[54.715, 180.963, 239.308, 175.084, 147.044, 136.262, 184.009]
159.626

[58.129, 32.922, 59.797, 116.654]

66.875