There are 5 classes in the third grade, with an average of 52 students in each class, and a total of 1,820 trees are planted. How many trees are planted by each student on average?
三年级有5个班，平均每个班有52个同学，一共栽树1820棵，平均每个同学栽树多少棵？
<gadget id="calculator">52 * 5</gadget>
<output>260</output>

<gadget id="calculator">1_820 / 260</gadget>
<output>7</output>

<result>7</result>