How much less is 0.4 tons than 0.5 tons
0.4吨比0.5吨少多少
<gadget id="calculator">0.5 - 0.4</gadget>
<output>0.1</output>

<gadget id="calculator">0.1 / 0.5</gadget>
<output>0.2</output>

<result>0.2</result>