Read a book mischievously, read the whole book (2/15) on the first day, and read 3 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 pages did naughty read the next day?
淘气读一本书，第一天读了全书的(2/15)，第二天比第一天多读了3页，这时已读的页数与剩下页数的比是3：7，淘气第二天读多少页？
<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">(2/15) * 2</gadget>
<output>4/15 = around 0.266667</output>

<gadget id="calculator">(3/10) - (4/15)</gadget>
<output>1/30 = around 0.033333</output>

<gadget id="calculator">3 / (1/30)</gadget>
<output>90</output>

<gadget id="calculator">90 * (2/15)</gadget>
<output>12</output>

<gadget id="calculator">12 + 3</gadget>
<output>15</output>

<result>15</result>