The school buys 4 packs of the same book, 120 books in each pack, and 7 yuan for each book. How much does it cost in total?
学校买来4包同样的书，每包120本，每本7元，一共要付多少钱？
<gadget id="calculator">4 * 120 * 7</gadget>
<output>3_360</output>

<result>3_360</result>