# 开学第一单 # # 百万积分第7季 # # One year of eraser? # This wish can come true! I used to have a doubt when I went to school 🤔: An eraser always disappears before it is used up😂 I have to buy a new eraser every new semester! I haven't solved this puzzle yet, but I now have a good way to solve it: go to 99 cent and buy an extra-large eraser! This eraser is about the same length as my ruler, and the thickness is about the same as a normal eraser. Every time I can't find the eraser, I cut a small piece 😂 Recently my mother came to me with the idea of this eraser 😂 Successfully realized "a piece of eraser, A family-friendly economic structure😂