A bundle of wires uses 25% of the total length for the first time, and 30% of the total length for the second time. The first time uses 6 meters less than the second time. How many meters is the total length of this bundle of wires?
一捆电线，第一次用全长的25%，第二次用去全长的30%，第一次比第二次少用6米，这捆电线全长多少米？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(3/10) - (1/4)</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">6 / (1/20)</gadget>
<output>120</output>

<result>120</result>