The store shipped 200 pairs of shoes, which were packed in 2 wooden boxes and 4 cartons. If 3 cartons contained the same amount of shoes as 1 wooden box, how many pairs of shoes could be packed in a carton?
商店运来200双鞋，分别装在2个木箱和4个纸箱中，如果3个纸箱与1个木箱装的鞋同样多，那么，一个纸箱装多少双鞋？
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">6 + 4</gadget>
<output>10</output>

<gadget id="calculator">200 / 10</gadget>
<output>20</output>

<result>20</result>