"Grimm's Fairy Tales" has 152 pages in total. Xiaolin plans to spend 8 days reading it. After reading 52 pages in 3 days, how many pages will he read on average every day from the 4th day?
《格林童话》共152页，小林准备花8天的时间看完，3天看了52页后，从第4天开始，平均每天要看多少页？
<gadget id="calculator">152 - 52</gadget>
<output>100</output>

<gadget id="calculator">8 - 3</gadget>
<output>5</output>

<gadget id="calculator">100 / 5</gadget>
<output>20</output>

<result>20</result>