Xiaoqiang finished reading a book in three days. He read 18 pages on the first day, the rest (5/13) on the second day, and exactly half of the book on the third day. How many pages did you read?
小强三天读完一本书，第一天读了18页，第二天读了余下的(5/13)，第三天读的正好是这本书的一半，第二、三两天共读了多少页？
<gadget id="calculator">5 / 13</gadget>
<output>5/13 = around 0.384615</output>

<gadget id="calculator">1 - (5/13)</gadget>
<output>8/13 = around 0.615385</output>

<gadget id="calculator">(5/13) / (8/13)</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">(5/8) * (1/2)</gadget>
<output>5/16 = around 0.3125</output>

<gadget id="calculator">1 - (5/16) - (1/2)</gadget>
<output>3/16 = around 0.1875</output>

<gadget id="calculator">18 / (3/16)</gadget>
<output>96</output>

<gadget id="calculator">96 - 18</gadget>
<output>78</output>

<result>78</result>