For Xiaopang’s birthday, he divides a 10-inch cake into 8 pieces. Dad eats 3 pieces, mother eats 2 pieces, and the rest is eaten by Xiaopang himself. How much of the cake did Xiaopang eat?
小胖过生日是把一个10寸蛋糕平分成8块，爸爸吃了3块，妈妈吃了2块剩下的小胖自己吃，小胖吃了这个蛋糕的几分之几？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">2 / 8</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (3/8) - (1/4)</gadget>
<output>3/8 = around 0.375</output>

<result>3/8 = around 0.375</result>