A road is 18879.5 meters long. Team A can complete it in 10 days, and team B can complete it in 15 days. How many days can team A and team B complete?
一条路长18879.5米，甲队独修10天完成，乙队独修15天修完，甲、乙两队合修多少天可以修完？
<gadget id="calculator">1 / 10</gadget>
<output>1/10 = around 0.1</output>

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

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

<gadget id="calculator">1 / (1/6)</gadget>
<output>6</output>

<result>6</result>