500 grams (3/5) is equivalent to 30% of how many kilograms.
500克的(3/5)相当于多少千克的30%．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">(3/5) / 1_000 / (3/10)</gadget>
<output>1/500 = around 0.002</output>

<gadget id="calculator">500 * (1/500)</gadget>
<output>1</output>

<result>1</result>