Zhang Ming reads a science and technology book. He read 16% of the book on the first day, and read 1/5 of the whole book on the second day. He read 6 pages more than the first day. How many pages are there in total? ? (Column comprehensive formula solution)
张明读一本科技书，第一天读了这本书的16%，第二天又读了全书的(1/5)，比第一天多读6页，这本书一共是多少页？(列综合算式解)
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">16 / 100</gadget>
<output>4/25 = around 0.16</output>

<gadget id="calculator">(1/5) - (4/25)</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">6 / (1/25)</gadget>
<output>150</output>

<result>150</result>