Cars A and B leave opposite directions at the same time from places A and B, and they are expected to meet each other in 10 hours. After the two cars have been driving for 6 hours, car A stops due to a breakdown, and car B continues to drive for 6 hours and encounters car A. How many hours will it take for car B to reach point A?
甲、乙两车同时从A，B两地相向开出，预计10小时可以相遇．两车同时行驶6小时后，甲车因故障停开，而乙车又继续开了6小时遇到甲车．乙车还要多少小时才能到达A地．
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/10) * 6</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) / 6</gadget>
<output>1/15 = around 0.066667</output>

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

<gadget id="calculator">15 - 6 - 6</gadget>
<output>3</output>

<result>3</result>