A car travels from A to B at a speed of 60 kilometers per hour, takes 3 hours, and only takes 2 hours to return. How many kilometers does the car travel per hour when it returns?
一辆汽车从甲地开往乙地，去时的速度是每小时60千米，共用3小时，返回时只用2小时，这辆汽车返回时每小时行多少千米？
<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

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

<result>90</result>