Cleaning house

As I was sitting here listening to Fleetwood Mac and eating hotdogs, I thought it might be a good idea to clean the house. It's a rare occasion that the babies are away, so I thought I should take the opportunity to clean the house. Its important to clean the house so the twins feel more comfortable trashing it again. The main question that I would like to propose to you this evening is: If a tree's shadow is 67.3 feet long, and the sun is 23 degrees W, how tall is the tree? For the record, even if there is a solution this problem, I wouldn't even know how to get the answer. I might be able to reach the right conclusion if it had something to do with hotdogs or Jared Fogle or hearty meat sauce, but without those variables, I'm pretty lost.