trpp5

x = int(input())
a = input()
b = input()
d = {'mm': 1, 'cm': 2, 'dm': 3, 'm': 4, 'km': 7}


def convert(x, a, b):
    if (d[b] - d[a]) > 0:
        temp = 10 ** abs((d[b] - d[a]))
        return x / temp
    elif (d[b] - d[a]) < 0:
        temp = 10 ** abs((d[b] - d[a]))
        return x * temp


print(convert(x, a, b))