### Instruction: Voldemort bought a book for $\$5$. It was one-tenth of its original price. What was the original price in dollars?### Response: I know that the original price is ten times the sale price, because the sale price was one-tenth of the original price.
So, to find the original price, I can multiply the sale price by ten.
That means the original price is $\$5 \times 10$, which is $\$50$.