A and B repair a road, A alone completes it in 10 days, and B alone completes it in 15 days. If two teams work together, how many days will it take to complete? What is the column
甲，乙修一条路，甲单独修10天完成，乙单独修15天完成．如果2队合修，需要几天完成？列式是多少
<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>