A book has 200 pages, Xiaoxiao read 50% of the book in 8 days, how many pages did he read?
一本书有200页，笑笑8天看了这本书的50%，看了多少页．
<gadget id="calculator">50 / 100</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">200 * (1/2)</gadget>
<output>100</output>

<result>100</result>