A car drives from place A to place B, travels 60 kilometers per hour when going there, arrives in 8 hours, and travels an extra 20 kilometers per hour when returning, how many hours can it return to place A?
一辆汽车从甲地开往乙地，去时每小时行60千米，8小时到达，回来时每小时多行20千米，请问几小时可以返回甲地？
<gadget id="calculator">60 * 8</gadget>
<output>480</output>

<gadget id="calculator">60 + 20</gadget>
<output>80</output>

<gadget id="calculator">480 / 80</gadget>
<output>6</output>

<result>6</result>