0.6 kilometers is much less than 0.75 kilometers.
0.6千米比0.75千米少多少．
<gadget id="calculator">0.75 - 0.6</gadget>
<output>0.15</output>

<gadget id="calculator">0.15 / 0.75</gadget>
<output>0.2</output>

<result>0.2</result>