There is a batch of books in the bookstore, and the number of books sold on the first day is 15 less than (1/6) of this batch of books. At this time, there are still (7/8) of the total number left. How many books are there in this batch of books?
书店有一批书，第一天卖出的比这批书的(1/6)少15本，这时还剩下总数的(7/8)，这批书共有多少本？
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">7 / 8</gadget>
<output>7/8 = around 0.875</output>

<gadget id="calculator">1 - (7/8)</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(1/6) - (1/8)</gadget>
<output>1/24 = around 0.041667</output>

<gadget id="calculator">15 / (1/24)</gadget>
<output>360</output>

<result>360</result>