How much less is 0.2 tons than 0.8 tons
0.2吨比0.8吨少多少
<gadget id="calculator">0.8 - 0.2</gadget>
<output>0.6</output>

<gadget id="calculator">0.6 / 0.8</gadget>
<output>0.75</output>

<result>0.75</result>