If 25% of the total length of a wire is used up, there will be 4 meters more. At this time, the remaining length is 10 meters longer than the used one. How many meters is this wire originally?
一根电线，用去全长的25%还多4米，这时剩下的比用去的多10米，求这根电线原来有多少米？
<gadget id="calculator">4 + 10 + 4</gadget>
<output>18</output>

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

<gadget id="calculator">(1/4) * 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 - (1/2)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">18 / (1/2)</gadget>
<output>36</output>

<result>36</result>