Aunt Li folded a rope in half and measured a 2-meter-long floral cloth, but the rope was 4 decimeters longer. Do you know how long this rope is?
李阿姨把一根绳子对折后去量一块长2米的花布，结果绳子还多出4分米．你知道这条绳子有多长吗？
<gadget id="calculator">4 / 10</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">2 + (2/5)</gadget>
<output>12/5 = around 2.4</output>

<gadget id="calculator">(12/5) * 2</gadget>
<output>24/5 = around 4.8</output>

<result>24/5 = around 4.8</result>