Xiaohua reads a 150-page storybook for 3 days, with an average of 18 pages per day. How many pages are left?
小花看一本150页的故事书，看了3天，平均每天看18页．还剩多少页没看？
<gadget id="calculator">18 * 3</gadget>
<output>54</output>

<gadget id="calculator">150 - 54</gadget>
<output>96</output>

<result>96</result>