There are two bookshelves, A and B. It is known that there are 24 fewer books on shelf A than on shelf B. If 15 books are taken from shelf A and placed on shelf B, then the books on shelf A are equivalent to those on shelf B. 5/8), how many books are there in Bookshelf B?
有甲、乙两个书架，已知甲书架的书比乙书架的书少24本，如果从甲书架上拿出15本放入乙书架，这时甲书架上的书相当于乙书架的(5/8)，乙书架原来有多少本书？
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">15 * (5/8)</gadget>
<output>75/8 = around 9.375</output>

<gadget id="calculator">24 + 15 + (75/8)</gadget>
<output>387/8 = around 48.375</output>

<gadget id="calculator">1 - (5/8)</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(387/8) / (3/8)</gadget>
<output>129</output>

<result>129</result>