A car travels 65 kilometers per hour from place A to place B. It takes 4.8 hours to travel 80 kilometers per hour when it returns. How long will it take to return to the original place? (Using the solution ratio method)
一辆汽车，从甲地到乙地，去时每小时行65千米，用了4.8小时，返回时每小时行80千米，多长时间能返回原地？(用解比例的方法)
<gadget id="calculator">65 * 4.8</gadget>
<output>312</output>

<gadget id="calculator">312 / 80</gadget>
<output>39/10 = around 3.9</output>

<result>39/10 = around 3.9</result>