The school plans to add a batch of new books to the library. If you buy 24 of the same storybook, you will need to spend 600 yuan. If you want to buy 30 such storybooks, how much will you need to spend? (Answer with the knowledge of proportion)
学校计划为图书室增添一批新书．如果买24本同样的故事书，则要用去600元，如果要买30本这种故事书，要用去多少元？(用比例的知识解答)
<gadget id="calculator">600 / 24</gadget>
<output>25</output>

<gadget id="calculator">25 * 30</gadget>
<output>750</output>

<result>750</result>