A project can be completed by team A alone in 15 days. It is known that team A’s work in 3 days is equal to the work of team B in two days. How many days will it take for the two teams to work together?
一项工程，甲队独做15天完成，已知甲队3天的工作等于乙队两天的工作量，两队合做几天完成？
<gadget id="calculator">1 / 15</gadget>
<output>1/15 = around 0.066667</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(1/15) * (3/2)</gadget>
<output>1/10 = around 0.1</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>