number = float(input())
initial_size= str(input())
result_size = str(input())

if initial_size == "m":
    if result_size == "cm":
        print(f"{number * 100:.3f}")
    elif result_size == "mm":
        print(f"{number * 1000:.3f}")
elif initial_size == "cm":
    if result_size == "m":
        print(f"{number / 100:.3f}")
    elif result_size == "mm":
        print(f"{number * 10:.3f}")
elif initial_size == "mm":
    if result_size == "m":
        print(f"{number / 1000:.3f}")
    elif result_size == "cm":
        print(f"{number / 10:.3f}")