Zhang Dan reads a storybook for 3 hours a day, 30 pages per hour, and finishes it in 4 days. How many pages does the storybook have?
张丹看一本故事书，每天看3个小时，每小时考30页，4天正好看完，这本故事书一共有多少页？
<gadget id="calculator">30 * 3 * 4</gadget>
<output>360</output>

<result>360</result>