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.

[-66.676, -7.063, -18.028, 13.407, 54.369, 148.394, -93.155]
4.464

[58.271, 233.766, -9.758, -40.349, 145.507, 90.294, 186.999]
94.961

[114.576, 223.373, -6.895]

110.351