A college purchased 200 boxes of signature pens and ballpoint pens in a reading activity, 12 in each box. How many pens were purchased for this reading activity?
某高校在一次读书活动中购进签字笔、圆珠笔各200盒，每盒各12枝．这次读书活动共购进多少枝笔？
<gadget id="calculator">200 * 2 * 12</gadget>
<output>4_800</output>

<result>4_800</result>