A and B each have a certain amount of RMB. When A gives B his own money (1/5), B also gives A his current money (1/5). equal. It turns out that A's money is B's ((())/(())).
甲乙两人各有人民币若干元，当甲拿出自己钱数的(1/5)给乙后，乙也拿出自己现在钱数的(1/5)给甲，这时两人的钱数相等．原来甲的钱数是乙的((())/(()))．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">100 / (4/5)</gadget>
<output>125</output>

<gadget id="calculator">125 * (1/5)</gadget>
<output>25</output>

<gadget id="calculator">100 - 25</gadget>
<output>75</output>

<gadget id="calculator">75 / (4/5)</gadget>
<output>375/4 = around 93.75</output>

<gadget id="calculator">(375/4) * (1/5)</gadget>
<output>75/4 = around 18.75</output>

<gadget id="calculator">125 - (75/4)</gadget>
<output>425/4 = around 106.25</output>

<gadget id="calculator">(375/4) / (425/4)</gadget>
<output>15/17 = around 0.882353</output>

<result>15/17 = around 0.882353</result>