a,b,c=map(str,input().split())
if b == "+":
print(round((float(a)+float(c)),3))
elif b == "-":
print(round((float(a)-float(c)),2))
elif b == "*":
print(round((float(a)*float(c)),2))
elif b == "/":
print(round((float(a)/float(c)),2))
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