Mingming reads a storybook, if he reads 12 pages a day, it takes 15 days to finish it, if the book needs to be finished 5 days in advance, how many pages does Mingming need to read every day?
明明看一本故事书，如果每天看12页，需要15天才能看完，如果这本书要提前5天看完，明明每天要看多少页？
<gadget id="calculator">15 * 12</gadget>
<output>180</output>

<gadget id="calculator">15 - 5</gadget>
<output>10</output>

<gadget id="calculator">180 / 10</gadget>
<output>18</output>

<result>18</result>