When typing a manuscript, A will finish typing in 8 hours alone, B will finish typing in 12 hours alone, C will finish typing in 15 hours alone, A and B will finish typing in 2 hours together, B and C will finish typing in another 3 hours, and the rest will be done by How many hours does C need to complete alone?
打一份稿件，甲单独打8小时打完，乙单独打12小时打完，丙单独打15小时打完，甲、乙合打2小时后，乙、丙再打3小时，剩下的由丙单独完成，需要几小时？
<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

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

<gadget id="calculator">(1/8) + (1/12)</gadget>
<output>5/24 = around 0.208333</output>

<gadget id="calculator">(5/24) * 2</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">(1/12) + (1/15)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">(3/20) * 3</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">1 - (5/12) - (9/20)</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">(2/15) / (1/15)</gadget>
<output>2</output>

<result>2</result>