A storybook has 160 pages. Xiao Ming has been reading it for 4 days, 32 pages a day. How many pages are left?
一本故事书160页，小明已经看了4天，每天看32页，还剩多少页没有看？
<gadget id="calculator">32 * 4</gadget>
<output>128</output>

<gadget id="calculator">160 - 128</gadget>
<output>32</output>

<result>32</result>