The school plans to process 600 sets of tables and chairs. A said: "Our team contracted, and the task can be completed in 10 days." B said: "Our team contracted, and the task can be completed in 15 days." The school decided to let the two teams work together. Can complete the task?
学校计划加工600套桌椅，甲说："我们队承包，10天能完成任务．"乙说："我们队承包，15天能完成任务．"学校决定让两个队一起加工，这样多少天能完成任务？
<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>