#design a calculator 
a=int(input("enter the number1 :-"))
b=int(input("enter the number2 :-"))
c=input("enter the operaton")
if(c=='+'):
    print(a+b)
elif(c=='-'):
    print(a-b)
elif(c=='/'):
    print(a/b)
elif(c=='*'):
    print(a*b)
elif(c=='//'):
    print(a//b)
elif(c=='%'):
    print(a%b)
else:
    print("wrong value")