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.

[-32.557, -70.922, 191.786, 244.222]
83.132

[127.703, -82.203, 53.438]
32.979

[163.797, -99.63, 69.84, -17.979, -1.254, 144.035, 234.913]

70.532