Xiao Ming originally planned to read a 240-page storybook in 12 days, but actually read 10 pages more than the original plan every day. How many days does it take to actually read this book?
小明原计划12天看一本240页的故事书，实际每天比原计划多看10页．实际看完这本书需多少天？
<gadget id="calculator">240 / 12</gadget>
<output>20</output>

<gadget id="calculator">20 + 10</gadget>
<output>30</output>

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

<result>8</result>