Find the ratio: 75 grams: 0.5 kilograms = how much.
求比值：75克：0.5千克=多少．
<gadget id="calculator">0.5 * 1_000</gadget>
<output>500</output>

<gadget id="calculator">75 / 500</gadget>
<output>3/20 = around 0.15</output>

<result>3/20 = around 0.15</result>