A piece of rope is 2 meters long, cut off (1/5) first, and then connect (1/5) meter. Is the current length longer or shorter than before? How many meters is the difference?
一段绳子长2米，先截去(1/5)，再接上(1/5)米．现在的长度比原来长还是短？相差多少米？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

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

<gadget id="calculator">2 * (4/5)</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">(8/5) + (1/5)</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">2 - (9/5)</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>