Liu Jia in the reading group helped Teacher Wang to repair a batch of books. When Teacher Wang repaired (1/8) of the total number, Liu Jia repaired 36 books. The two continued to repair according to the original efficiency, and Liu Jia repaired (3/10) of the total number. At this time, Teacher Wang repaired half of the total number. How many books are there in total?
阅读组的刘佳同学帮助王老师修补一批图书，当王老师修补了总数的(1/8)时，刘佳修补了36本．二人按原来的效率继续修补，刘佳又修补了总数的(3/10)，这时王老师一共修补了总数的一半，要修补的这批图书一共多少本．
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (1/2) - (1/8) - (3/10)</gadget>
<output>3/40 = around 0.075</output>

<gadget id="calculator">36 / (3/40)</gadget>
<output>480</output>

<result>480</result>