Xiaohong's mother bought 13 eggs from the vegetable market, but accidentally damaged 4 of them on the way home. How many eggs can each member of Xiaohong's family eat on average?
小红的妈妈从菜市场买了13只鸡蛋，回家的路上不小心碰坏了4个，小红一家三口每人平均可以吃几个鸡蛋？
<gadget id="calculator">13 - 4</gadget>
<output>9</output>

<gadget id="calculator">9 / 3</gadget>
<output>3</output>

<result>3</result>