请你做出我上传题目的讲解视频。在视觉效果上我希望更适合儿童理解学习。---(19) 学校食堂买了15箱苹果,每箱10千克,1千克苹果9元。买这些苹果一共多少元?
Chart/Diagram Description:
Type: Illustration/Diagram
Main Elements:
- A stack of boxes forming a rectangular block.
- The block consists of 3 columns and 5 rows, totaling 15 boxes.
- Each individual box is depicted as a cube or rectangular prism.
- Each box is labeled with the text "10千克" (10 kilograms).
- Each box also shows an image of two apples.
- The illustration visually represents 15 boxes, each containing 10 kilograms of apples.