A car travels from A to B at 60 km per hour and arrives in 6 hours. How many kilometers per hour do you need to travel to get there in 4 hours?
一辆汽车从甲地开往乙地，每小时行60千米，6小时到达．若要4小时到达，则每小时需要行多少千米？
<gadget id="calculator">6 / 4</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">60 * (3/2)</gadget>
<output>90</output>

<result>90</result>