25 is 25% more than 20, how much is 20 less than 25
25比20多25%，20比25少多少
<gadget id="calculator">25 - 20</gadget>
<output>5</output>

<gadget id="calculator">5 / 25</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>