Xiao Ming cuts the birthday cake into 8 pieces on average, father ate 3 pieces, mother ate 2 pieces, and Xiao Ming ate the rest, how many cakes did Xiao Ming eat?
小明把生日蛋糕平均切成8块，爸爸吃了3块，妈妈吃了2块，剩下的小明自己吃，小明自己吃了多少个蛋糕？
<gadget id="calculator">8 - 3 - 2</gadget>
<output>3</output>

<result>3</result>