For a piece of iron wire, the full length (2/5) is used for the first time, and 14 meters is used for the second time. The ratio of the remaining length to the used length is 1:3. How many meters is this wire?
一根铁丝，第一次用去全长的(2/5)，第二次又用去14米，剩下的与用去的长度比是1：3．这根铁丝原来多少米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

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

<gadget id="calculator">1 - (2/5) - (1/4)</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">14 / (7/20)</gadget>
<output>40</output>

<result>40</result>