Dongdong has been reading a 150-page storybook for 3 days, 32 pages a day. How many pages are there yet?
东东看一本150页的故事书，已经看了3天，每天看32页．还有多少页没有看？
<gadget id="calculator">3 * 32</gadget>
<output>96</output>

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

<result>54</result>