Xiaojun reads a story book. After a few days, the ratio of the number of pages he has read to the number of pages he has not read is 3:4. After reading another 44 pages, the ratio of pages he has not read to the total number of pages in the book is 3:8. How many pages does the book have?
小军读一本故事书，若干天后，已读的与未读的比是3：4，又读了44页后，未读的与这本书总页数的比为3：8，这本书有多少页？
<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">(4/7) - (3/8)</gadget>
<output>11/56 = around 0.196429</output>

<gadget id="calculator">44 / (11/56)</gadget>
<output>224</output>

<result>224</result>