a = int(input('digite um número:'))
b = int(input('digite outro número:'))
c = (input("escolha a operação que deseja: / para dividir, * para multiplicar - para subtrair e + para somar: "))
while c != "/" and c != "*" and c != "-" and c != "+":
    c = (input("digite um operador válido"))
if c == "/":
    print (a / b)
elif c == "*":
    print(a * b)
elif c == "-":
    print(a - b)
else:
    print(a + b)
 
#https://pt.stackoverflow.com/q/570637/101

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

MgozCioK

2
3
*