Zhang Weihao rushed to repair a 504-meter-long road, and repaired 224 meters in the first 6 hours. At this speed, how many hours will it take to complete the rest?
张维昊抢修一条长504米的公路，前6小时修了224米，按这样的速度，剩下的需要几小时修完？
<gadget id="calculator">504 - 224</gadget>
<output>280</output>

<gadget id="calculator">224 / 6</gadget>
<output>112/3 = around 37.333333</output>

<gadget id="calculator">280 / (112/3)</gadget>
<output>15/2 = around 7.5</output>

<result>15/2 = around 7.5</result>