A wire is used up (3/5) meter, and the rest is longer than the used one (1/5) meter, what is the original length of the wire?
一根铁丝用去(3/5)米，剩下的比用去的长(1/5)米，这根铁丝原来长多少米．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(3/5) + (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) + (1/5)</gadget>
<output>1</output>

<result>1</result>