Xiao Ming reads 575 pages of a book for 5 days, and reads an average of 75 pages a day. How many pages are left?
小明看一本书575页，看了5天，平均每天阅读75页，还剩多少页没看？
<gadget id="calculator">75 * 5</gadget>
<output>375</output>

<gadget id="calculator">575 - 375</gadget>
<output>200</output>

<result>200</result>