If 0.5X=0.25, then X-0.08=how much.
如果0.5X=0.25，那么X一0.08=多少．
<gadget id="calculator">0.25 / 0.5</gadget>
<output>0.5</output>

<gadget id="calculator">0.5 - 0.08</gadget>
<output>0.42</output>

<result>0.42</result>