The teacher takes several students to eat ice cream. If he buys each student one crushed ice and a 2-yuan small cone, there will be a total shortfall of 15 yuan; 5 yuan, how many students are there in total?
老师带着几个学生去吃冰淇淋，如果给每个学生买一个碎碎冰和一个2元钱的小甜筒，一共缺15元钱；如果只给每个学生买一个碎碎冰，还缺5元钱，一共有几个学生？
<gadget id="calculator">15 - 5</gadget>
<output>10</output>

<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<result>5</result>