There is an iron wire, half of the total length is used for the first time, and the remaining (1/3) is used for the second time, leaving 6 meters. How long is this wire in meters?
有一根铁丝，第一次用去全长的一半，第二次用去余下的(1/3)，还剩6米．这根铁丝全长多少米？
<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>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/2) - (1/6)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">6 / (1/3)</gadget>
<output>18</output>

<result>18</result>