rope, cut (3/18) meters for the first time, and (1/9) meters for the second time, leaving (5/9) meters. How many meters is this rope?
一根绳子，第一次截去(3/18)米，第二次截去(1/9)米，还剩(5/9)米．这根绳子长多少米？
<gadget id="calculator">3 / 18</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">5 / 9</gadget>
<output>5/9 = around 0.555556</output>

<gadget id="calculator">(1/6) + (1/9) + (5/9)</gadget>
<output>5/6 = around 0.833333</output>

<result>5/6 = around 0.833333</result>