Cars A and B start from places A and B at the same time and drive toward each other. It is known that car A travels 40 kilometers per hour. The two cars meet after 6 hours. After meeting, they continue to move forward. After another 3 hours, car A Arriving at point B, ask: How long will it take for car B to reach point A?
甲、乙两车分别从A、B两地同时出发相向而行，已知甲车每小时行驶40千米，两车6小时后相遇，相遇后它们继续前进，又过了3小时，甲车到达B地，问：乙车还要过多久才能到达A地？
<gadget id="calculator">3 / 6</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">40 * (1/2)</gadget>
<output>20</output>

<gadget id="calculator">6 / 20</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">40 * (3/10)</gadget>
<output>12</output>

<result>12</result>