For a rope, 20% of the total length is cut off for the first time and 3 meters are cut off, and 1/3 of the total length is cut off for the second time and 2 meters are cut off, leaving 6 meters left. How long is this rope in meters?
一根绳子，第一次剪去全长的20%多3米，第二次剪去全长的(1/3)少2米，还剩6米，这根绳子全长多少米？
<gadget id="calculator">7 / 15</gadget>
<output>7/15 = around 0.466667</output>

<gadget id="calculator">7 / (7/15)</gadget>
<output>15</output>

<result>15</result>