50 is 25% more than 40, how much less is 40 than 50
50比40多25%，40比50少多少
<gadget id="calculator">50 - 40</gadget>
<output>10</output>

<gadget id="calculator">10 / 50</gadget>
<output>1/5 = around 0.2</output>

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