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.

[-73.074, 87.743, 221.875, 126.604, 31.513, 196.863]
98.587

[233.848, -58.713, 126.623, 27.615, 62.365, 200.239, 13.38]
86.48

[225.248, -56.406]

84.421