If you read 6 pages a day for a literary book, you can finish it in 20 days. If you have to finish it 8 days in advance, how many more pages should you read every day?
一本文艺书，每天读6页，20天可以读完，要提前8天看完，每天要比原来多看几页？
<gadget id="calculator">20 - 8</gadget>
<output>12</output>

<gadget id="calculator">20 / 12</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">6 * (5/3)</gadget>
<output>10</output>

<gadget id="calculator">10 - 6</gadget>
<output>4</output>

<result>4</result>