There are several books in the school library, 150 books are lent out for the first time, and the rest (4/9) are lent out for the second time, the remaining books are exactly the total number (5/12), and the second time the book is lent out How many copies?
学校图书馆有图书若干本，第一次借出150本，第二次又借出余下的(4/9)后，剩下的书恰好是总数的(5/12)，第二次借出多少本？
<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">150 * (4/9)</gadget>
<output>200/3 = around 66.666667</output>

<gadget id="calculator">150 - (200/3)</gadget>
<output>250/3 = around 83.333333</output>

<gadget id="calculator">5 / 12</gadget>
<output>5/12 = around 0.416667</output>

<gadget id="calculator">1 - (5/12) - (4/9)</gadget>
<output>5/36 = around 0.138889</output>

<gadget id="calculator">(250/3) / (5/36)</gadget>
<output>600</output>

<gadget id="calculator">600 - 150</gadget>
<output>450</output>

<gadget id="calculator">450 * (4/9)</gadget>
<output>200</output>

<result>200</result>