Hope Primary School has 24 classes, with an average of 45 students in each class. Each student can collect 3 kilograms of waste paper per semester. How many kilograms of waste paper can all students in the school collect in one semester?
希望小学有24个班，平均每班45人，每个学生每个学期可收集废纸3千克，全校学生一学期可收集废纸多少千克？
<gadget id="calculator">45 * 24 * 3</gadget>
<output>3_240</output>

<result>3_240</result>