In order to reward the "little pacesetters who are thrifty and thrifty", the experimental primary school bought 6 boxes of pens, 9 pens in each box, and the total cost was 378 yuan. How much is each pen?
实验小学为了奖励"勤俭节约小标兵"，买了6盒钢笔，每盒9支，共用了378元，每支钢笔多少元？
<gadget id="calculator">9 * 6</gadget>
<output>54</output>

<gadget id="calculator">378 / 54</gadget>
<output>7</output>

<result>7</result>