Ding Ding does 3 pages of winter vacation homework every day and finishes it in 14 days. Lingling does 2 pages a day. How many days can she finish it?
丁丁每天做3页寒假作业，14天做完，玲玲每天做2页，多少天可以做完？
<gadget id="calculator">14 / 2</gadget>
<output>7</output>

<gadget id="calculator">3 * 7</gadget>
<output>21</output>

<result>21</result>