I usually read a book, originally planned to read 50 pages a day, and finished it in 8 days. I actually finished reading it in 5 days, how many more pages did I actually read every day than planned?
平平看一本书，原计划每天看50页，8天看完．我实际5天就看完了，实际每天比计划多看多少页？
<gadget id="calculator">8 / 5</gadget>
<output>8/5 = around 1.6</output>

<gadget id="calculator">50 * (8/5)</gadget>
<output>80</output>

<gadget id="calculator">80 - 50</gadget>
<output>30</output>

<result>30</result>