What was the question for this implicit rationale, and corresponding answer?
60 packs of cards * 7 cards per pack = 420 cards. 420 cards / 10 cards per page = 42 pages.
 The answer: 42
The question: Punger collects baseball cards. He buys 60 packs of baseball cards. Each pack has 7 cards inside. He wants to put these cards in special pages to protect the cards. Each page can hold 10 cards. How many pages does he need to buy?