a = int(input())
b = input()
c = int(input())
if b == "+" :
print (a + c)
if b == "-" :
print (a - c)
if b == "*" :
print (a * c)
if b == "/" :
print (a / c)
if b == "//" :
print (a // c)
if b == "**" :
print (a ** c)
if b == "%" :
print (a % c)
else :
print("")
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