Known: (135/(11+((2(1/4))/(1-0)))-1/7)*1(1/6)=1. Then ○=how much.
已知：(135/(11+((2(1/4))/(1-0)))-1/7)*1(1/6)=1．则○=多少．
<gadget id="calculator">9 / 496</gadget>
<output>9/496 = around 0.018145</output>

<gadget id="calculator">1 - (9/496)</gadget>
<output>487/496 = around 0.981855</output>

<result>487/496 = around 0.981855</result>