Xiao Ming reads a story book in 10 days, while Xiao Hua takes 12 days. Xiao Ming reads 4 more pages than Xiao Hua every day. How many pages does this storybook have?
一本故事书，小明10天看完，小华要看12天，小明每天比小华多看4页．这本故事书一共有多少页？
<gadget id="calculator">12 - 10</gadget>
<output>2</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">4 * 5 * 12</gadget>
<output>240</output>

<result>240</result>