求翻译!It's Saturday. Dong Yun's father asks him to draw three

求翻译!
It's Saturday. Dong Yun's father asks him to draw three apples on a piece of paper. He thinks it is too difficult for him to do so. Then he has an idea. After his father goes away, he eats two of them and finishes the drawing quickly. His father is very surprised to see what is on the paper. But when he finds one apple there, he knows what happens.