while True:
    x = (input('First number:'''))
    y = (input('Second number:'''))
    arithmetic = (input('Choose operation:'''))
    if arithmetic =="+":
                print('{} + {} = '.format(x, y), end='')
                print(int(x)+int(y))
    elif arithmetic == '-':
                print('{} - {} = '.format(x, y), end='')
                print(int(x)-int(y))
    elif arithmetic == '/':
                print('{} / {} = '.format(x, y), end='')
                print(int(x)/int(y))
    else:
            print('Неизвестная операция')