04. Metric Converter

unit = float(input())
conv_from = str(input())
conv_to = str(input())
converted = 0

if conv_from == "mm" and conv_to == "cm":
    converted = unit / 10
elif conv_from == "mm" and conv_to == "m":
    converted = unit / 1000
elif conv_from == "cm" and conv_to == "mm":
    converted = unit * 10
elif conv_from == "cm" and conv_to == "m":
    converted = unit / 100
elif conv_from == "m" and conv_to == "cm":
    converted = unit * 100
elif conv_from == "m" and conv_to == "mm":
    converted = unit * 1000

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