Xiaodong reads a storybook. He reads a total of 68 pages in the first 4 days, and a total of 72 pages in the next 3 days. How many pages does Xiaodong read on average every day? what is the correct formula
小东看一本故事书，前4天共看68页，后3天共看72页，小东平均每天看多少页？正确的算式是多少
<gadget id="calculator">68 + 72</gadget>
<output>140</output>

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">140 / 7</gadget>
<output>20</output>

<result>20</result>