求一下这个题的步骤，简单一点

Question

Answer 1

while True: #无限循环
    num1 = input("num1: "))
    num2 = input("num2:"))
    operator = input("operator: ")
    if operator == "/" and float(num2) == 0:
        print("除数不能为0")
    print(num1 + operator +num2) #输出计算结果