The highway team builds a road, which is planned to be 1.5 kilometers per day and completed in 20 days. The actual 6 kilometers per day, how many days can the repair be completed? (Solve with ratio)
公路队修一条路，计划每天1.5千米，20天完成．实际每天6千米，实际几天可以修完？(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>