After having lunch with some friends, Zaphod Beeblebrox flies away from the Restau- rant at the End of the Universe for some fun at the casinos in the Megabrantis Cluster 200 light years away. Arthur Dent, who doesn't gamble, hitches a ride with Slartibartfast to the Pleiades Cluster 300 light years away, whose direction is 30° from the direction of the Megabrantis Cluster. Arther realizes he left his towel in Zaphod's spaceship. In what direction must Slartibartfast head in order to get Arthur's towel back?