The solution ratio is my best: 3: (x+1)=9:4.
解比例我最行：3：(x+1)=9：4．
<gadget id="calculator">9 / 4</gadget>
<output>9/4 = around 2.25</output>

<gadget id="calculator">3 - (9/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) / (9/4)</gadget>
<output>1/3 = around 0.333333</output>

<result>1/3 = around 0.333333</result>