Teacher Li plans to finish reading a 350-page educational book in April, and read 9 pages a day for the first two weeks. How many pages are left?
李老师计划在4月份阅读完一本350页的教育书籍，前两个星期每天看9页，还剩多少页没有看？
<gadget id="calculator">2 * 7 * 9</gadget>
<output>126</output>

<gadget id="calculator">350 - 126</gadget>
<output>224</output>

<result>224</result>