x/(4/9)=(2/5)/2.
x/(4/9)=(2/5)/2．
<gadget id="calculator">2 / 5 / 2</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">(1/5) * (4/9)</gadget>
<output>4/45 = around 0.088889</output>

<result>4/45 = around 0.088889</result>