It takes Xiao Ming 12 days to read a storybook, 60 pages in the first 5 days, and 20 pages a day in the next 7 days. How many pages does this book have?
一本故事书小明要12天看完，前5天看了60页，后7天每天看20页．这本书共有多少页？
<gadget id="calculator">20 * 7</gadget>
<output>140</output>

<gadget id="calculator">140 + 60</gadget>
<output>200</output>

<result>200</result>