Dolma reads 15 pages of a storybook every day, and can finish it in 12 days. If you read 3 more pages every day, how many days can you finish reading? (Answer with proportional knowledge)
一本故事书，卓玛每天看15页，12天可以看完．如果每天多看3页，多少天可以看完？(用比例知识解答)
<gadget id="calculator">15 * 12</gadget>
<output>180</output>

<gadget id="calculator">15 + 3</gadget>
<output>18</output>

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

<result>10</result>