The school bought 7 boxes of chalk, each box has 24 boxes, and each box of chalk is 5 yuan. How much are these chalks in total?
学校买了7箱粉笔，每箱有24盒，每盒粉笔5元，这些粉笔一共多少元？
<gadget id="calculator">7 * 24 * 5</gadget>
<output>840</output>

<result>840</result>