Uncle Liu is driving a car to take the expressway from A to B. It is planned to travel 90 kilometers per hour and arrive in 6 hours. If you want to arrive one hour earlier, how many kilometers per hour do you have to drive?
刘叔叔开小汽车准备走高速公路从甲地到乙地．计划每小时行90千米，6小时到达．如果想提前一小时到达，每小时要行驶多少千米？
<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">6 / 5</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">90 * (6/5)</gadget>
<output>108</output>

<result>108</result>