A car travels from A to B at 65 km per hour and arrives in 12 hours. It took 15 hours to return from place B, how many kilometers per hour did the average travel on the return?
一辆汽车从甲地开往乙地，每小时行驶65千米，12小时到达．从乙地返回时用了15小时，返回时平均每小时行驶多少千米？
<gadget id="calculator">12 / 15</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">65 * (4/5)</gadget>
<output>52</output>

<result>52</result>