Dongdong reads a comic book, and reads the same number of pages every day, originally planned to finish it in 5 days. Now he reads 2 more pages than originally planned every day, but ended up reading it one day earlier. How many pages does this comic book have?
冬冬看一本漫画册，每天看同样多的页数，原计划5天看完．现在他每天比原计划多看2页，结果提前一天看完，这本漫画册共有多少页？
<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">5 - 4</gadget>
<output>1</output>

<gadget id="calculator">8 / 1</gadget>
<output>8</output>

<gadget id="calculator">5 * 8</gadget>
<output>40</output>

<result>40</result>