A book has a total of 300 pages, Dongdong has read 148 pages, and finished it in the remaining 4 days, how many pages do you read on average per day?
一本书共300页，东东已看了148页，余下的4天看完，余下的平均每天看多少页？
<gadget id="calculator">300 - 148</gadget>
<output>152</output>

<gadget id="calculator">152 / 4</gadget>
<output>38</output>

<result>38</result>