There is a rope, cut off (2/5) meters for the first time, and cut off (2/3) of the original length of the rope for the second time, then the rope still has (3/5) meters. How long is this rope?
有一根绳子，第一次剪去(2/5)米，第二次剪去原来这根绳子全长的(2/3)，这时这根绳子还有(3/5)米．这根绳子原来长多少米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

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

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / (1/3)</gadget>
<output>3</output>

<result>3</result>