A rope is cut off (1/3) and then connected to 3 meters. At this time, it is the same length as the original one. How many meters is the original length of the rope?
一根绳子，剪去(1/3)后又接上3米，这时与原来的同样长，这根绳子原来长多少米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 / (1/3)</gadget>
<output>9</output>

<result>9</result>