A wire, 3.5 meters is cut off for the first time, and the remaining (2/9) is cut off for the second time, leaving 14 meters. How long is this wire originally?
一根电线，第一次剪去3.5米，第二次剪去余下的(2/9)，还剩下14米，这条电线原来长多少米？
<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">1 - (2/9)</gadget>
<output>7/9 = around 0.777778</output>

<gadget id="calculator">14 / (7/9)</gadget>
<output>18</output>

<gadget id="calculator">18 + 3.5</gadget>
<output>21.5</output>

<result>21.5</result>