The number A is (9/5) of the number B. After taking out the number A and giving it to the number B, the two numbers are equal.
甲数是乙数的(9/5)，取出甲数的多少给乙数后，两数相等．
<gadget id="calculator">9 / 5</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">1 + (9/5)</gadget>
<output>14/5 = around 2.8</output>

<gadget id="calculator">(14/5) / 2</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">(9/5) - (7/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/5) / (9/5)</gadget>
<output>2/9 = around 0.222222</output>

<result>2/9 = around 0.222222</result>