On Xiao Ming's birthday, his mother bought a big birthday cake. There are 5 people in the family, so how much cake does each person eat on average?
小明过生日时，妈妈买了一个大生日蛋糕，全家有5口人，那么平均一人吃多少蛋糕．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<result>1/5 = around 0.2</result>