A and B walk toward each other from A and B at the same time, and meet each other in 6 hours. A needs to travel from A to B in 10 hours, and how many hours does B need to travel from B to A?
甲、乙两人同时从A、B两地相向而行，6小时相遇，甲从A到B需行10小时，乙从B到A需几小时？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

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

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

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

<result>15</result>