If a road is built 120 meters per day, it can be completed in 10 days; if it is 150 meters per day, how many days can it be completed? (Solution by proportional method)
修一条路，如果每天修120米，10天可以修完；如果每天修150米，几天可以修完？(用比例方法解)
<gadget id="calculator">120 * 10</gadget>
<output>1_200</output>

<gadget id="calculator">1_200 / 150</gadget>
<output>8</output>

<result>8</result>