To build a road, if you build 1,200 meters a day, you can finish it in 8 days; if you build 800 meters a day, how many days can you finish it? (Solution by proportional method)
修一条路，如果每天修1200米，8天可以修完；如果每天修800米，几天可以修完？(用比例方法解)
<gadget id="calculator">1_200 * 8</gadget>
<output>9_600</output>

<gadget id="calculator">9_600 / 800</gadget>
<output>12</output>

<result>12</result>