For a project, it takes 15 days for Team A to repair it alone, and 12 days for Team B to repair it alone. After 5 days of joint work, Team A has another task, and Team B will complete the rest alone. How many days will it take to complete?
一项工程，甲队单独修要15天，乙队单独修要12天，甲乙合做5天后，甲队另有任务，剩下的由乙队单独完成．还需多少天才能完成？
<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

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

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

<gadget id="calculator">(3/20) * 5</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">1 - (3/4)</gadget>
<output>1/4 = around 0.25</output>

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

<result>3</result>