A and B buy a book together. It turns out that B asks A to pay (1/3) the price of the book, but A pays 2 yuan more, and B still pays 25% more than A. This book How much is the price of the book.
甲、乙两人合买一本书，原来乙让甲出这本书定价的(1/3)的钱，但甲多出了2元，乙出的钱仍然比甲多25%，这本书的定价是多少元．
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">2 * (1/4)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 + 2 + (1/2)</gadget>
<output>9/2 = around 4.5</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">(1/3) * (1/4)</gadget>
<output>1/12 = around 0.083333</output>

<gadget id="calculator">1 - (1/3) - (1/3) - (1/12)</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(9/2) / (1/4)</gadget>
<output>18</output>

<result>18</result>