The number of books stored on shelf A is (2/3) that of shelf B. If 35 books are taken from shelf B and put into shelf A, the number of books stored on shelf B is 25% of the total number of books on both shelves. How many books are stored on shelf A? ?
甲书架存书册数是乙书架的(2/3)，如果从乙书架取出35册放入甲书架，则乙书架存书册数是两书架总册数的25%，原来甲书架存书多少册？
<gadget id="calculator">2 + 3</gadget>
<output>5</output>

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

<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(3/5) - (1/4)</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">35 / (7/20)</gadget>
<output>100</output>

<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">100 * (2/5)</gadget>
<output>40</output>

<result>40</result>