The engineering team is going to build a section of expressway, originally planned to build 0.4km per day and complete the task in 600 days. Due to the increase of machinery and equipment, the actual daily increase is 25% more than the original plan. How many days will the actual task be completed? (Solve with ratio)
工程队要修建一段高速公路，原计划每天修0.4km，600天完成任务．由于增加了机器设备，实际每天比原计划多了25%，实际多少天完成任务？(用比例解)
<gadget id="calculator">0.4 * 600</gadget>
<output>240</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">0.4 * (5/4)</gadget>
<output>0.5</output>

<gadget id="calculator">240 / 0.5</gadget>
<output>480</output>

<result>480</result>