To copy a manuscript, Lili and Wenwen can complete the copy within 15 hours of cooperation, and if Lili copies it alone, it can be completed within 24 hours. Now after Wenwen and Lili have copied 9 hours together, Lili will copy the rest by herself. How many hours will it take to finish copying?
抄一份稿件，丽丽和文文二人合作15小时可抄完，如果丽丽单独一人抄，24小时可抄完．现在文文和丽丽合抄9小时后，余下的由丽丽一人单独抄，还要几小时抄完？
<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/15) * 9</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">1 / 24</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">(2/5) / (1/24)</gadget>
<output>48/5 = around 9.6</output>

<result>48/5 = around 9.6</result>