What is the ratio of 30 kilograms: 0.3 tons.
30千克：0.3吨的比值是多少．
<gadget id="calculator">0.3 * 1_000</gadget>
<output>300</output>

<gadget id="calculator">30 / 300</gadget>
<output>1/10 = around 0.1</output>

<result>1/10 = around 0.1</result>