If (2/3)x=(4/5)y, then x:y=((())/(())).
如果(2/3)x=(4/5)y，那么x：y=((())/(()))．
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">(4/5) / (2/3)</gadget>
<output>6/5 = around 1.2</output>

<result>6/5 = around 1.2</result>