It takes 12 hours for Xiao Chen and Xiao Liu to type a manuscript. If Xiao Chen typed for 4 hours first, then Xiao Liu typed for 5 hours, so that the entire manuscript can be completed (11/30). Question: How many hours will it take for Xiao Liu to type this manuscript alone?
打一份书稿，小陈和小刘合作打，需12小时完成，如果由小陈先打4小时后，再由小刘打5小时，这样可以完成全部书稿的(11/30)，问：由小刘单独打这份书稿，需要多少小时完成？
<gadget id="calculator">11 / 30</gadget>
<output>11/30 = around 0.366667</output>

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">4 * (1/12)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(11/30) - (1/3)</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">5 - 4</gadget>
<output>1</output>

<gadget id="calculator">(1/30) / 1</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">1 / (1/30)</gadget>
<output>30</output>

<result>30</result>