The school organizes spring outings and rents boats for students to row. There are 3 people in each boat, and there are 16 people without a boat; if there are 5 people in each boat, there are 4 people on one boat. How many students are there in total in the school?
学校组织春游，租船让学生划．每条船坐3人，有16人没有船坐；如果每条船坐5人，则有一条船上差4人．学校共有学生多少人．
<gadget id="calculator">16 + 4</gadget>
<output>20</output>

<gadget id="calculator">5 - 3</gadget>
<output>2</output>

<gadget id="calculator">20 / 2</gadget>
<output>10</output>

<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<gadget id="calculator">30 + 16</gadget>
<output>46</output>

<result>46</result>