There are 28 bottles of healthy milk in a box. Lingling and Junjun drank all of them in a week. How many bottles do they drink per day on average?
一箱健康牛奶共28瓶，玲玲和君君姐弟俩一个星期全喝光了，他们平均每人每天喝了几瓶？
<gadget id="calculator">28 / 7 / 2</gadget>
<output>2</output>

<result>2</result>