A car transports relief supplies to the disaster area. It was originally planned to drive 60km per hour and reach the destination in 12 hours. Due to climate reasons, the car traveled 10km per hour less than planned. How many hours did it actually take for the car to reach the disaster area? (Solve using ratio method)
一辆汽车为灾区运送救灾物资，原计划每小时行驶60km，12h可以到达目的地，由于气候原因，每小时比计划少行驶10km，这辆汽车实际上是用多少小时到达灾区？(用比例方法解答)
<gadget id="calculator">60 * 12</gadget>
<output>720</output>

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

<gadget id="calculator">720 / 50</gadget>
<output>72/5 = around 14.4</output>

<result>72/5 = around 14.4</result>