A's number is (4/9) times (27/5), B's (4/9) is (4/5), how much is the difference between A and B?
甲数是(27/5)的(4/9)倍，乙数的(4/9)是(4/5)，甲、乙两数相差多少？
<gadget id="calculator">27 / 5</gadget>
<output>27/5 = around 5.4</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">(27/5) * (4/9)</gadget>
<output>12/5 = around 2.4</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(4/5) / (4/9)</gadget>
<output>9/5 = around 1.8</output>

<gadget id="calculator">(12/5) - (9/5)</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>