A swimming pool has two inlet pipes A and B. Opening water pipe A alone can fill the pool in 2 hours, and opening water pipe B alone can fill the pool in 3 hours. If the two pipes are opened together, how many hours can it be filled?
一个游泳池装有甲、乙两个进水管．单开甲水管2小时可将池注满，单开乙水管3小时可将池注满．如果两管齐开，几小时可注满？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/2) + (1/3)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 / (5/6)</gadget>
<output>6/5 = around 1.2</output>

<result>6/5 = around 1.2</result>