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

[138.63, 106.759, 86.625]
110.671

[141.854, -17.197, -94.653, 64.323, 206.034, 183.205]

80.594