If x:2=(1/9):(1/3), then ҳ=how much.
如果x：2=(1/9)：(1/3)，那么ҳ=多少．
<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">(1/9) * 2</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(2/9) / (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>