The number of A's books is B's (3/4). After A gives B 6 books, the number of A's books is B's (3/5). How many books does A have?
甲的书本数是乙的(3/4)，甲给乙6本书后，甲的书本数是乙的(3/5)，甲原有书多少本？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">6 * (3/5)</gadget>
<output>18/5 = around 3.6</output>

<gadget id="calculator">6 + (18/5)</gadget>
<output>48/5 = around 9.6</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">(3/4) - (3/5)</gadget>
<output>3/20 = around 0.15</output>

<gadget id="calculator">(48/5) / (3/20)</gadget>
<output>64</output>

<gadget id="calculator">64 * (3/4)</gadget>
<output>48</output>

<result>48</result>