A storybook has 400 pages, Zhang Hua reads 18 pages every day, how many pages are left after two weeks?
一本故事书有400页，张华每天看18页，两个星期后还剩多少页没有看？
<gadget id="calculator">18 * 14</gadget>
<output>252</output>

<gadget id="calculator">400 - 252</gadget>
<output>148</output>

<result>148</result>