For classmate Xiaomei’s birthday, she divided a birthday cake into 8 pieces on average, father and mother each ate 3 pieces, and Xiaomei ate the rest, how much did Xiaomei eat?
小梅同学过生日，把一个生日蛋糕平均分成8块，爸爸和妈妈各吃了3块，剩下的小梅全吃了，小梅吃了几分之几？
<gadget id="calculator">3 / 8</gadget>
<output>3/8 = around 0.375</output>

<gadget id="calculator">1 - (3/8) - (3/8)</gadget>
<output>1/4 = around 0.25</output>

<result>1/4 = around 0.25</result>