A stock used to be 4 yuan per share, but now it is 3 yuan per share, how much has it fallen from the original
一种股票原来每股4元，现在每股3元，比原来跌了多少
<gadget id="calculator">4 - 3</gadget>
<output>1</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>