A convoy transports a batch of relief supplies. The original plan was to travel 60 kilometers per hour and reach the disaster area in 7.5 hours, but the actual travel was 80 kilometers per hour. According to this calculation, how many hours will it take to complete the journey?
某车队运送一批救灾物资．原计划每小时行60千米，7.5小时到达灾区，实际每小时行80千米．照这样计算，行完全程需要多少小时？
<gadget id="calculator">7.5 / 80</gadget>
<output>0.09375</output>

<gadget id="calculator">60 * 0.09375</gadget>
<output>5.625</output>

<result>5.625</result>