The school bought 2 boxes of pens, 10 in each box, and 12 yuan for each pen. How much did you spend in total?
学校买了2盒钢笔，每盒10枝，每枝钢笔12元．一共用了多少元？
<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<gadget id="calculator">12 * 20</gadget>
<output>240</output>

<result>240</result>