A car drives from place A to place B, travels 50 kilometers per hour, and arrives in 12 hours. When returning from place B to place A, the speed increases by 20%. How long does it take to return? (Solve with ratio)
一辆汽车从甲地开往乙地，每小时行50千米，12小时到达，从乙地返回甲地时，速度提高了20%，返回时要多少时间？(用比例解)
<gadget id="calculator">50 * 12</gadget>
<output>600</output>

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

<gadget id="calculator">50 * (1/5)</gadget>
<output>10</output>

<gadget id="calculator">50 + 10</gadget>
<output>60</output>

<gadget id="calculator">600 / 60</gadget>
<output>10</output>

<result>10</result>