The school bought 3 boxes of pens, each with 10 pens, and the total cost was 360 yuan. How much is an average pen?
学校买了3盒钢笔，每盒10支，一共用了360元．平均每支钢笔多少元？
<gadget id="calculator">10 * 3</gadget>
<output>30</output>

<gadget id="calculator">360 / 30</gadget>
<output>12</output>

<result>12</result>