a = int(input())
b = input()
c = int(input())
if b == "+":
print(a + c)
elif b == "-":
print(a - c)
if b == "*":
print(a * c)
elif 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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