There are 2 classes in the third grade, each class has 45 students, a total of 810 kilograms of vegetables are cut, how many kilograms of vegetables are cut by each student on average?
三年级2个班，每班有45个同学，一共割菜810千克，平均每个同学割菜多少千克？
<gadget id="calculator">45 * 2</gadget>
<output>90</output>

<gadget id="calculator">810 / 90</gadget>
<output>9</output>

<result>9</result>