It takes Team A 15 days to repair a section of road alone, and Team B takes 10 days to repair it alone. After 3 days of joint training by teams A and B, the rest will be completed by team B. How many more days will it take?
修一段公路甲队单独要15天完成，乙队单独修要10天完成．甲乙两队合修3天后，余下的由乙队修完，还要修多少天呢？
<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">(1/15) + (1/10)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/6) * 3</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(1/2) / (1/10)</gadget>
<output>5</output>

<result>5</result>