It takes 15 working days for Team A to complete a job alone. If Team B and Team A do it together, it only takes 6 working days. Ask: If this job is assigned to Team B to do it alone, how many Can it be done in a working day?
一项工作，甲队单独完成要15个工作日，如乙队与甲队一起做，只需6个工作日就能完成，问：如果这项工作交给乙队单独做，只需多少个工作日就能完成？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

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

<gadget id="calculator">(1/6) - (1/15)</gadget>
<output>1/10 = around 0.1</output>

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

<result>10</result>