A piece of rope, cut off (3/5), leaving (3/5) meters, how many meters was the original length of this rope?
一条绳子，剪去(3/5)，还剩下(3/5)米，这条绳子原长多少米？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/5) / (2/5)</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>