Huanhuan reads a storybook, originally planned to read 12 pages a day, and finished it in 15 days, but ended up finishing it 5 days earlier. How many pages do you actually read every day?
欢欢看一本故事书，原计划每天看12页，15天看完，结果提前5天看完．实际每天多看了几页？
<gadget id="calculator">12 * 15</gadget>
<output>180</output>

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

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

<gadget id="calculator">18 - 12</gadget>
<output>6</output>

<result>6</result>