If a bamboo pole is less than 6 meters long, make a mark A from one end to 3 meters, and then make a mark B from one end to 3 meters. At this time, the distance between A and B is 20% of the total length. What is the length in meters.
一根竹竿长不到6米，从一端量到3米处做一个记号A，再从一端量到3米处做一个记号B，这时AB间的距离是全长的20%，则竹竿的长度是多少米．
<gadget id="calculator">3 + 3</gadget>
<output>6</output>

<gadget id="calculator">20 / 100</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>