If ((a)/(b))=((a+3)/(b+9)), then ((a)/(b))=how much.
若((a)/(b))=((a+3)/(b+9))，则((a)/(b))=多少．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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