A village is building a road. The original plan is to build 25 kilometers per day, and the task will be completed in 18 days. In order to get through early, the repair is now 20% more than planned every day. How many days can I complete this task? (Solve with ratio)
某村修筑一条公路，原计划每天修筑25千米，18天完成任务．为了提早通路，现在每天比计划多修了20%，请问多少天能完成这项任务？(用比例解)
<gadget id="calculator">25 * 18</gadget>
<output>450</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">25 * (1/5)</gadget>
<output>5</output>

<gadget id="calculator">25 + 5</gadget>
<output>30</output>

<gadget id="calculator">450 / 30</gadget>
<output>15</output>

<result>15</result>