A road is 1,500 meters long, and it takes 15 days for A to repair alone, and 10 days for B to repair it alone. How many days will it take for the two teams to complete the repair together? (Jiangshan City, Zhejiang Province)
一条公路长1500米，单独修好甲要15天，乙要10天，两队合修需几天才能完成？(浙江江山市)
<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 / (1/6)</gadget>
<output>6</output>

<result>6</result>