There is a new batch of books in the school library, 45 books are lent out on the first day, and (1/3) of the total number is lent out on the second day. At this time, the remaining books are as many as the number of books borrowed. How many books are there in this new batch? ?
学校图书室新进一批图书，第一天借出45本，第二天借出总数的(1/3)，这时剩下的与借出的图书本数一样多，这批新书有多少本？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

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

<gadget id="calculator">(1/2) - (1/3)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">45 / (1/6)</gadget>
<output>270</output>

<result>270</result>