To build a long road, it will take 18 days for Team A to complete it alone, and 12 days for Team B to complete it alone. How many days will it take for the two teams to build (1/2) the project together?
修一条长路，甲队单独修要18天完成，乙队单独修要12天完成，两队合修这项工程的(1/2)，要多少天完成？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 18</gadget>
<output>1/18 = around 0.055556</output>

<gadget id="calculator">1 / 12</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">(1/18) + (1/12)</gadget>
<output>5/36 = around 0.138889</output>

<gadget id="calculator">(1/2) / (5/36)</gadget>
<output>18/5 = around 3.6</output>

<result>18/5 = around 3.6</result>