What is the ratio of 0.4 kg: 300 g?
0.4千克：300克的比值是多少．
<gadget id="calculator">0.4 * 1_000</gadget>
<output>400</output>

<gadget id="calculator">400 / 300</gadget>
<output>4/3 = around 1.333333</output>

<result>4/3 = around 1.333333</result>