num1 = eval(input("请输入第一个数: ")) num2 = eval(input("请输入第二个数: ")) print("{} + {} = {}".format(num1, num2, num1+num2)) print("{} - {} = {}".format(num1, num2,num1-num2)) print("{} × {} = {}".format(num1, num2,num1*num2)) print("{} ÷ {} = {}".format(num1, num2,num1/num2))