There is a 79-page storybook, Xiaoxiao has been reading it for a week, 8 pages a day. How many pages are there yet?
有一本79页的故事书，笑笑已经看了一周，每天看8页．现在还有多少页没有看？
<gadget id="calculator">8 * 7</gadget>
<output>56</output>

<gadget id="calculator">79 - 56</gadget>
<output>23</output>

<result>23</result>