Produce 216 cars in 12 days. How many days are planned to produce 234 cars?
12天生产216辆小汽车．计划生产234辆小汽车，需要多少天？
<gadget id="calculator">216 / 12</gadget>
<output>18</output>

<gadget id="calculator">234 / 18</gadget>
<output>13</output>

<result>13</result>