Both Archie and Xiaoyue have a lot of popular science books, Archie has more popular science books than Xiaoyue (3/8). Later, after Xiaoyue gave Archie 11 books, the number of popular science books of Archie became Xiaoyue's (4/7). So how many books does Archie have less than Xiaoyue?
阿奇和小悦都有很多科普书，阿奇的科普书数量是小悦的(3/8)．后来小悦送给阿奇11本书后，阿奇的科普书数量就变成了小悦的(4/7)．原来阿奇比小悦少多少本书？
<gadget id="calculator">7 + 4</gadget>
<output>11</output>

<gadget id="calculator">4 / 11</gadget>
<output>4/11 = around 0.363636</output>

<gadget id="calculator">8 + 3</gadget>
<output>11</output>

<gadget id="calculator">3 / 11</gadget>
<output>3/11 = around 0.272727</output>

<gadget id="calculator">(4/11) - (3/11)</gadget>
<output>1/11 = around 0.090909</output>

<gadget id="calculator">11 / (1/11)</gadget>
<output>121</output>

<gadget id="calculator">1 - (3/11) - (3/11)</gadget>
<output>5/11 = around 0.454545</output>

<gadget id="calculator">121 * (5/11)</gadget>
<output>55</output>

<result>55</result>