A car drives from place A to place B, travels 40 kilometers per hour, and arrives in 5 hours. If the speed increases by 25%, how long will it take to arrive? (solved with knowledge of proportions)
汽车从甲地开往乙地，每小时行40千米，5小时到达，如果速度提高25%，几小时到达？(用比例的知识解决)
<gadget id="calculator">40 * 5</gadget>
<output>200</output>

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

<gadget id="calculator">40 * (1/4)</gadget>
<output>10</output>

<gadget id="calculator">40 + 10</gadget>
<output>50</output>

<gadget id="calculator">200 / 50</gadget>
<output>4</output>

<result>4</result>