Xiaohong read a book for 4 days, 120 pages a day, and there are 56 pages left, how many pages are there in this book?
一本书，小红看了4天，每天看120页，还剩56页没有看完，这本书共有多少页．
<gadget id="calculator">120 * 4</gadget>
<output>480</output>

<gadget id="calculator">480 + 56</gadget>
<output>536</output>

<result>536</result>