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.

[-62.202, 222.562, -18.684, 67.674, -41.353, 134.927, -92.211]
30.102

[95.725, 112.04, 231.963]
146.576

[132.06, 66.966, 109.216, 52.337]

90.145