What is the ratio of 40 kilograms: 0.4 tons.
40千克：0.4吨的比值是多少．
<gadget id="calculator">0.4 * 1_000</gadget>
<output>400</output>

<gadget id="calculator">40 / 400</gadget>
<output>1/10 = around 0.1</output>

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