A car travels 350 km in 7 hours. At this speed, how many hours will it take to travel 500 kilometers?
一辆汽车7小时行驶了350千米．照这样的速度，要行驶500千米，需要几小时？
<gadget id="calculator">350 / 7</gadget>
<output>50</output>

<gadget id="calculator">500 / 50</gadget>
<output>10</output>

<result>10</result>