A rope is (7/12) meters long, and (3/7) of it is cut off for the first time, and (3/8) meters less than twice the length of the first time. How much rice was cut for the second time?
一根绳子长(7/12)米，第一次剪去它的(3/7)，第二次剪去的比第一次的2倍少(3/8)米．第二次剪去多少米？
<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">(7/12) * (3/7) * 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(1/2) - (3/8)</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>