Wang Xia bought a 140-page storybook and has read 86 pages. The remaining plan is to finish reading in 6 days. How many pages should I read every day?
王霞买来一本140页的故事书，已经看了86页．剩下的计划6天看完，每天要看多少页？
<gadget id="calculator">140 - 86</gadget>
<output>54</output>

<gadget id="calculator">54 / 6</gadget>
<output>9</output>

<result>9</result>