There is a 200-page book, and Weiwei read 25% of the book on the first day, and continued to see how many pages he should start reading on the second day.
有200页的书，伟伟第一天看了这本书的25%，第二天接着看他应从多少页看起．
<gadget id="calculator">25 / 100</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">200 * (1/4)</gadget>
<output>50</output>

<gadget id="calculator">50 + 1</gadget>
<output>51</output>

<result>51</result>