It takes 9 hours for Xiaofang to type a manuscript alone, and 12 hours for Xiaohong to type it alone. After the two have cooperated for 3 hours, Xiaohong will play the rest alone. How many hours will it take to finish the game?
打一份书稿，小芳单独打需9小时打完，小红单独打需12小时打完．两人合作3小时后，剩下的由小红单独打，还需要几小时才能打完？
<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

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

<gadget id="calculator">(1/9) + (1/12)</gadget>
<output>7/36 = around 0.194444</output>

<gadget id="calculator">(7/36) * 3</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">1 - (7/12)</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">(5/12) / (1/12)</gadget>
<output>5</output>

<result>5</result>