A, B, C, and three people have a total of 54 yuan. A uses his own money (3/5), B uses his own money (3/4), and C uses his own money (2/3 ), and each bought an identical pen, how much money A and C have left in total.
甲、乙、丙、三人共有54元钱，甲用了自己钱数的(3/5)，乙用了自己钱数的(3/4)，丙用了自己钱数的(2/3)，各买了一支相同的钢笔，甲与丙两人一共剩下多少元．
<gadget id="calculator">5 / 3</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">3 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(5/3) + (4/3) + (3/2)</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">54 / (9/2)</gadget>
<output>12</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(5/3) * 12 * (2/5)</gadget>
<output>8</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(3/2) * 12 * (1/3)</gadget>
<output>6</output>

<gadget id="calculator">8 + 6</gadget>
<output>14</output>

<result>14</result>