A manuscript needs 8 hours to be copied by A alone, and 6 hours to be copied by B alone. Now both A and B are copying at the same time, and B stops copying for 1 hour in the middle, so how many hours will it take for them to finish copying?
一份稿件，由甲单独抄写需8小时完成，由乙单独抄写需6小时完成，现在由甲乙两人同时抄写，中途乙因事停抄1小时，这样他们要几小时才能抄完？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">1 - (1/8)</gadget>
<output>7/8 = around 0.875</output>

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

<gadget id="calculator">(1/8) + (1/6)</gadget>
<output>7/24 = around 0.291667</output>

<gadget id="calculator">(7/8) / (7/24)</gadget>
<output>3</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<result>4</result>