A car travels 280 kilometers from place A to place B in 4 hours. At the same speed, it takes 7 hours to reach B. How many kilometers are there between A and B?
一辆汽车从甲地开往乙地，4小时行了280千米，用同样的速度，一共行了7小时到达乙，甲乙两相距多少千米？
<gadget id="calculator">280 / 4</gadget>
<output>70</output>

<gadget id="calculator">70 * 7</gadget>
<output>490</output>

<result>490</result>