A car travels from city A to city B at an average speed of 80 kilometers per hour. After driving for 3 hours, there is still 240 kilometers away from City B. How many kilometers is the road between A and B?
一辆汽车从甲城开往乙城，平均每小时行驶80千米．行驶3小时后，离乙城还有240千米．甲乙两城之间的公路长多少千米？
<gadget id="calculator">80 * 3</gadget>
<output>240</output>

<gadget id="calculator">240 + 240</gadget>
<output>480</output>

<result>480</result>