There are two kinds of packaging for a kind of cake, one is 4 pieces per bag, and the other is 6 pieces per bag. Aunt Wang in the kindergarten wants to buy 1 cake for each of 40 children. How many different ways are there in total? (List first, then answer questions)
一种蛋糕有两种包装，一种每袋4个，另一种每袋装6个．幼儿园王阿姨要给40个小朋友每人买1个蛋糕，一共有多少种不同的买法？(先列表，再回答问题)
<result>3</result>