For a bamboo pole less than 6 meters long, mark A by measuring 3 meters from one end, and mark B by measuring 3 meters from the other end. The length of AB is exactly 20% of the total length. How many meters is the length of this bamboo pole?
一根不足6米的竹竿，从一头量3米作一记号A，从另一头量3米作一记号B，AB的长度恰好是全长的20%，这根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>