Solution ratio: 6.5x:3=10:9.
解比例：6.5x：3=10：9．
<gadget id="calculator">10 / 9</gadget>
<output>10/9 = around 1.111111</output>

<gadget id="calculator">(10/9) * 3</gadget>
<output>10/3 = around 3.333333</output>

<gadget id="calculator">(10/3) / 6.5</gadget>
<output>0.512821</output>

<result>0.512821</result>