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.

[-81.432, -63.059, 150.144, 55.203, 215.405, -89.797, 72.946]
37.059

[223.955, 41.858, -54.86, 8.742, 110.448]
66.029

[-49.954, 52.024, 191.779, 47.064]

60.228