A rope is 20 meters long, 8 meters are cut off, and the rest accounts for the original ((())/(())).
一根绳子长20米，剪去8米，剩下的占原来的((())/(()))．
<gadget id="calculator">20 - 8</gadget>
<output>12</output>

<gadget id="calculator">12 / 20</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>