Wang Gang is reading a 68-page storybook. He has been reading it for a week, with an average of 6 pages a day. How many pages does Wang Gang not read?
王刚看一本68页的故事书，他已经看了一个星期，平均每天看6页，王刚还有多少页没看？
<gadget id="calculator">6 * 7</gadget>
<output>42</output>

<gadget id="calculator">68 - 42</gadget>
<output>26</output>

<result>26</result>