What is the association between smoking and dying of lung cancer?

For cigarette smokers the lung cancer mortality rate = 140 per 100000. For nonsmokers the lung cancer mortality rate = 10 per 100000.
This is a question in my epidemiology class. And we have to interpret the results. Thanks!
We have to calculate the association between smoking adn dying of lung cancer by using the numbers above. Then with that number we have to interpret the results. I'm not sure how to go about doing that.