Xiao Ming reads a book, originally planned to read 24 pages a day, and finished it in 15 days, but actually read 6 more pages a day, how many days did he actually finish the book? (solution by equation)
小明看一本书，原计划每天看24页，15天看完，实际每天多看6页，实际多少天看完这本书？(用方程解)
<gadget id="calculator">24 * 15</gadget>
<output>360</output>

<gadget id="calculator">24 + 6</gadget>
<output>30</output>

<gadget id="calculator">360 / 30</gadget>
<output>12</output>

<result>12</result>