A bundle of wires uses 15% of the total length, and then 60m is connected, and the result is 45% longer than the original one. How many meters is the original length of the wire?
一捆电线，用去了全长的15%，再接上60m，结果比原来长45%，电线原来长多少米？
<gadget id="calculator">45 / 100</gadget>
<output>9/20 = around 0.45</output>

<gadget id="calculator">15 / 100</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">1 - (3/20)</gadget>
<output>17/20 = around 0.85</output>

<gadget id="calculator">(9/20) - (17/20)</gadget>
<output>-2/5 = around -0.4</output>

<gadget id="calculator">1 + (-2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">60 / (3/5)</gadget>
<output>100</output>

<result>100</result>