In the activity of collecting stamps, the 5 people in the first group collected a total of 535 stamps, and the 7 people in the second group collected a total of 728 stamps. Which group collected more stamps per person on average? How many more?
在收集邮票的活动中，第1小组5人共收集了535枚，第2小组7人共收集了728枚．哪个小组平均每人收集的邮票多一些？多几枚？
<gadget id="calculator">535 / 5</gadget>
<output>107</output>

<gadget id="calculator">728 / 7</gadget>
<output>104</output>

<gadget id="calculator">107 - 104</gadget>
<output>3</output>

<result>3</result>