Grandma Wang has saved 500 eggs and plans to give 100 to relatives, and the rest will be packed in 8 boxes. How many eggs can each box hold on average?
王奶奶攒了500个鸡蛋，准备送给亲属100个，余下的要装在8个箱子里，平均每个箱子装多少个鸡蛋？
<gadget id="calculator">500 - 100</gadget>
<output>400</output>

<gadget id="calculator">400 / 8</gadget>
<output>50</output>

<result>50</result>