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中国小学三年级学生理解学习。并且希望可以通过视频让学生感觉到趣味从而提升兴趣。---**Problem (20):**
校园里有一块 198 平方米的长方形空地。学校打算将这块空地铺上草坪。张叔叔18个小时能铺完吗？
**Relevant Text (张叔叔):**
Speech bubble: 我每小时可以铺9平方米的草坪。
Label: 张叔叔
**Relevant Text (亮亮's Analysis):**
Introduction: 对于这个问题，亮亮是这样分析的：
Analysis: 因为，198÷9>20, 张叔叔给这块空地铺好草坪需要的时间超过了20小时，所以，张叔叔18个小时肯定不能铺完。
Label: 亮亮
**Concluding Question:**
你认为亮亮的分析有道理吗？请说明理由。
**Chart/Diagram Description:**
* **Type:** Illustration with speech/thought bubbles.
* **Elements:**
* An illustration of a man labeled "张叔叔" (Uncle Zhang) wearing overalls and a hat. A speech bubble originates from him containing text.
* An illustration of a boy labeled "亮亮" (Liang Liang). A thought bubble originates from him containing text presenting an analysis.
* **Overall Scene:** The images and text are arranged to present a word problem followed by a proposed solution/analysis from one of the characters, and then a question asking the reader to evaluate the analysis.