A convoy transported a batch of relief supplies to Sichuan. The original plan was to travel 60 kilometers per hour, and it took 6.5 hours to arrive. Actually, it traveled 78 kilometers per hour. According to this calculation, how many hours will it take to complete the journey? (Solve with ratio)
某车队往四川运送一批救灾物资．原计划每小时行60千米，6.5小时到达，实际每小时行了78千米．照这样计算，行完全程需要多少小时？(用比例解)
<gadget id="calculator">60 * 6.5</gadget>
<output>390</output>

<gadget id="calculator">390 / 78</gadget>
<output>5</output>

<result>5</result>