Huiwen Bookstore shipped 25 bundles of books, 30 books in each bundle, with an average value of 4 yuan per book. How much are the books worth?
汇文书店运来25捆书，每捆30本，平均每本价值4元，运来的书一共值多少钱？
<gadget id="calculator">30 * 25</gadget>
<output>750</output>

<gadget id="calculator">4 * 750</gadget>
<output>3_000</output>

<result>3_000</result>