A bamboo pole is inserted into a pond, the part inserted into the mud occupies (1/4) of the total length, the part in the water occupies (1/4) of the total length, and the part above the water is 3m, what is the total length of the bamboo pole?
一根竹竿插入水塘，插入泥中部分占全长的(1/4)，水中部分占全长的(1/4)，水面上部分3m，求竹竿全长？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">3 / (1/4)</gadget>
<output>12</output>

<result>12</result>