For the construction of a road, it is planned to repair 1.5 kilometers per day, and it will be completed in 20 days. Actually, 6 kilometers per day will be repaired. How many days can it be completed? (Solve with ratio)
工程对修一条公路，计划每天修1.5千米，20天完成，实际每天修6千米，实际几天可修完？(用比例解)
<gadget id="calculator">1.5 * 20</gadget>
<output>30</output>

<gadget id="calculator">30 / 6</gadget>
<output>5</output>

<result>5</result>