Team A can complete a task alone in 15 days, and team B can complete it in 20 days alone. Now A and B cooperate for 5 days. How many days will it take for Team A to complete the rest?
一项工作甲队单独做15天可完成，乙队单独做20天可完成．现在甲、乙合作5天．剩下的甲队自己完成，还需多少天？
<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">1 / 20</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">(1/15) + (1/20)</gadget>
<output>7/60 = around 0.116667</output>

<gadget id="calculator">(7/60) * 5</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) / (1/15)</gadget>
<output>25/4 = around 6.25</output>

<result>25/4 = around 6.25</result>