There are two ropes of the same length, the first rope is cut off (3/5), the second rope is cut off (3/5) meters, the remaining length of the second rope is twice the length of the first rope, How long is the rope in meters?
有两根相同长短的绳子，第一根绳子切去(3/5)，第二根绳子切去(3/5)米，第二根绳子剩下的长度是第一根绳子的2倍，求绳子原来长多少米？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">(3/5) * 2</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">1 - 2</gadget>
<output>-1</output>

<gadget id="calculator">(6/5) + (-1)</gadget>
<output>1/5 = around 0.2</output>

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

<result>3</result>