(4/5) of the number A is equal to (5/4) of the number B (the number A is not 0), and the number A accounts for ((())/(())) of the number B.
甲数的(4/5)与乙数的(5/4)相等(甲数不为0)，甲数占乙数的((())/(()))．
<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">(5/4) * (5/4)</gadget>
<output>25/16 = around 1.5625</output>

<result>25/16 = around 1.5625</result>