A car travels from city A to city B at 56 km per hour and arrives in 5 hours. Returning to the time-empty car, the speed is 25% faster than the original hour, and it only takes a few hours to return?
一辆汽车从甲城开往乙城，每小时行56km，5小时到达．返回时空车，车速比原来每小时快25%，只要几小时就能返回？
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">56 * (1/4)</gadget>
<output>14</output>

<gadget id="calculator">56 + 14</gadget>
<output>70</output>

<gadget id="calculator">5 / 70</gadget>
<output>1/14 = around 0.071429</output>

<gadget id="calculator">56 * (1/14)</gadget>
<output>4</output>

<result>4</result>