dd

distance = float(input())
unit_one = input()
unit_two = input()
output = 0

if unit_one == "cm":
    if unit_two == "m":
        output = distance / 100
    elif unit_two == "mm":
        output = distance * 10

elif unit_one == "m":
    if unit_two == "cm":
        output = distance * 100
    if unit_two == "mm":
        output = distance * 1000

elif unit_one == "mm":
    if unit_two == "m":
        output = distance / 1000
    elif unit_two == "cm":
        output = distance / 10

print(f"{output:.3f}")