Master Wang drives from A to B. If the speed is 64 km/h, it takes 15 hours. What is the minimum driving speed in kilometers per hour to arrive within 12 hours?
王师傅开车从甲地去乙地，如果车速为64千米/小时，需要行驶15小时．若要在12小时内到达，开车速度最少应为多少千米/小时？
<gadget id="calculator">15 / 12</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">64 * (5/4)</gadget>
<output>80</output>

<result>80</result>