If a rope is less than 6 meters long, mark a mark A from one end of the rope to 3 meters, and make a mark B from the other end to 3 meters. The distance between A and B is exactly the length of the rope (1/5). How many meters is the length of the rope?
一根绳子长不足6米，从绳子的一头量到3米的地方记下一个记号A，从另一头量到3米处再作一个记号B，A、B之间的距离正好是绳长的(1/5)．绳长是多少米？
<gadget id="calculator">3 + 3</gadget>
<output>6</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 + (1/5)</gadget>
<output>6/5 = around 1.2</output>

<gadget id="calculator">6 / (6/5)</gadget>
<output>5</output>

<result>5</result>