There is an iron wire, cut 40% of it in the first time, and cut 6 meters more than the first time in the second time, leaving 12 meters left. How many meters is this wire?
有一根铁丝，第一次剪下它的40%，第二次比第一次多剪6米，还剩下12米．原来这根铁丝长多少米？
<gadget id="calculator">6 + 12</gadget>
<output>18</output>

<gadget id="calculator">40 / 100</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) * 2</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 - (4/5)</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">18 / (1/5)</gadget>
<output>90</output>

<result>90</result>