To copy a manuscript, A alone completed it for 5 hours (1/4), B continued to copy for 6 hours, and completed the rest (2/3), and finally the rest was copied by two people, how many hours will it take to complete ?
抄写一份稿件，甲先单独抄写5小时完成了(1/4)，乙接着抄写6小时，完成了余下的(2/3)，最后剩下的由两人合抄，还需多少小时完成？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(3/4) * (2/3)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/4) - (1/2)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(1/4) / 5</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(2/3) / 6</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">(3/4) * (1/9)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/20) + (1/12)</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">(1/4) / (2/15)</gadget>
<output>15/8 = around 1.875</output>

<result>15/8 = around 1.875</result>