Every 12 watercolor pens should be packed in a box, every 40 boxes should be packed in a box, and now we need to pack 5 boxes, how many watercolor pens do we need?
每12支水彩笔要装一盒，每40盒要装一箱，现在要装5箱，需要多少支水彩笔？
<gadget id="calculator">12 * 40 * 5</gadget>
<output>2_400</output>

<result>2_400</result>