Cars A and B are traveling towards each other from places A and B at the same time. After meeting each other for 6 hours, car A travels for another 4 hours to reach place B. Question: After the meeting, how many hours did it take for car B to reach place A?
甲、乙两车同时从A、B两地相向而行，经过6小时相遇，相遇后甲车又行了4小时到达B地．问：相遇后乙车又行了几小时才到达A地？
<gadget id="calculator">6 + 4</gadget>
<output>10</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/6) - (1/10)</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">6 / (1/15)</gadget>
<output>90</output>

<gadget id="calculator">(1/10) * 90</gadget>
<output>9</output>

<result>9</result>