1. 按下綠旗 (press the green flag) 2. 輸入一個數字然後按下Enter鍵（可正可負） (input a number, either positive or negtive, and the press "Enter") 3. 輸入加("+")或減("-") (input "+" or "-", and the press "Enter") 4. 再輸入一個數字然後按下Enter鍵（可正可負） (input a number again, either positive or negtive, and the press "Enter") 5. 貓咪會幫你求出答案 (The cat will find the answer for you)
