supermarket held a sales promotion during New Year's Day (buy 3 boxes of a drink and get 1 box free). There were 49 students in Class 1, Grade 5, freshman elementary school, and they bought 3 boxes of this drink, exactly one box for each person. How many boxes of beverages are there in each case?
某超市在元旦期间搞促销活动(一种饮料买3箱送1盒)，新生小学五年级1班共有学生49名，他们买了3箱这种饮料正好每人一盒．每箱饮料有多少盒？
<gadget id="calculator">49 - 1</gadget>
<output>48</output>

<gadget id="calculator">48 / 3</gadget>
<output>16</output>

<result>16</result>