metric_converter

number = float(input())
input_currency = input()
output_currency = input()
if input_currency == "cm":
    number = number * 10
elif input_currency == "m":
    number *= 1000
if output_currency == "mm":
    print(f'{number:.3f}')
elif output_currency == "cm":
    number /= 10
    print(f'{number:.3f}')
elif output_currency == "m":
    number /= 1000
    print(f'{number:.3f}')