1 kilogram (2/5) is how many kilograms (1/9).
1千克的(2/5)是多少千克的(1/9)．
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">(2/5) / (1/9)</gadget>
<output>18/5 = around 3.6</output>

<gadget id="calculator">1 * (18/5)</gadget>
<output>18/5 = around 3.6</output>

<result>18/5 = around 3.6</result>