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.
Q: [0.872, 13.005, 82.754, 94.817, 211.541, -81.096, 248.443]
A: 
81.477