Zhang Ming read a book, read 20% of it on the first day, and read it (5/8) on the second day, and read 34 pages more on the second day than on the first day. How many pages did Zhang Ming read on the first day?
张明读一本书，第一天读了它的20%，第二天读了它的(5/8)，第二天比第一天多读了34页．张明第一天读了多少页？
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(5/8) - (1/5)</gadget>
<output>17/40 = around 0.425</output>

<gadget id="calculator">34 / (17/40)</gadget>
<output>80</output>

<gadget id="calculator">80 * (1/5)</gadget>
<output>16</output>

<result>16</result>