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- print('calculator')
- while True:
- N=int(input())
- Op=input() #действие (+, -, *, //)
- M=int(input ())
- if Op == '+':
- print(N+M)
- elif Op == '-':
- print(N-M)
- elif Op == '*':
- print(N*M)
- elif Op == '//':
- if M!=0:
- print(N/M)
- else:
- print('Error')
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