import math
import time
print ("Welcome to Sam's Unit Converter")
cat = str(input("Which category would you like to convert? we support length(l) and Weight(w): "))
if cat == ("l"):
unit1 = str(input("Which unit would you like to convert from: "))
unit2 = str(input("Which unit would you like to convert to: "))
num1 = int(input("Enter your value: " ))
if unit1 == "cm" and unit2 == "m":
ans = float(num1)/100
print(ans)
elif unit1 == "mm" and unit2 == "cm":
ans = float(num1)/10
print(ans)
elif unit1 == "m" and unit2 == "cm":
ans = float(num1)*100
print(ans)
elif unit1 == "cm" and unit2 == "mm":
ans = float(num1)*10
print(ans)
elif unit1 == "mm" and unit2 == "m":
ans = float(num1)/1000
print(ans)
elif unit1 == "m" and unit2 == "mm":
ans = float(num1)*1000
print(ans)
elif unit1 == "km" and unit2 == "m":
ans = float(num1)*1000
print(ans)
elif unit1 == "m" and unit2 == "km":
ans = float(num1)/1000
print(ans)
elif unit1 == "mm" and unit2 == "km":
ans = float(num1)/1000000
print(ans)