A car travels 280 kilometers in 4 hours. At this speed, the car travels from Qianshan to Suzhou for 8 hours. How many kilometers is the road from Qianshan to Suzhou? (Use proportional knowledge to solve)
一辆汽车4小时行280千米，照这样的速度，这辆汽车从潜山到苏州行了8小时．潜山到苏州的公路长有多少千米？(用比例知识来解)
<gadget id="calculator">280 * 8</gadget>
<output>2_240</output>

<gadget id="calculator">2_240 / 4</gadget>
<output>560</output>

<result>560</result>