Xiao Ming reads a book and reads the whole book (2/15) on the first day, and reads 8 more pages on the second day than on the first day. At this time, the ratio of the number of pages read to the number of remaining pages is 3:7 , How many more pages can Xiao Ming read to finish this book?
小明读一本书，第一天读了全书的(2/15)，第二天比第一天多读了8页，这时已读的页数与剩下页数的比是3：7，小明再读多少页就能读完这本书？
<gadget id="calculator">3 + 7</gadget>
<output>10</output>

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

<gadget id="calculator">2 / 15</gadget>
<output>2/15 = around 0.133333</output>

<gadget id="calculator">(3/10) - (2/15)</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">(1/6) - (2/15)</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">8 / (1/30)</gadget>
<output>240</output>

<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">240 * (7/10)</gadget>
<output>168</output>

<result>168</result>