The number of A is more than the number of B by the number of B (1/4), and the number of B is less than the number of A by the amount of A
甲数比乙数多乙数的(1/4)，乙数则比甲数少甲数的多少
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 + (1/4)</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(1/4) / (5/4)</gadget>
<output>1/5 = around 0.2</output>

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