08a. Metric Converter

/*
 * Simple Conditions
 */
import java.math.BigDecimal;
import java.util.Scanner;

public class _08a_MetricConverter
{
    public static void main(String[] args)
    {
        Scanner scan = new Scanner(System.in);

        double inValue = Double.parseDouble(scan.nextLine());
        String inUnit = scan.nextLine();
        String outUnit = scan.nextLine();

        double meters;
        BigDecimal outValue;

        if (inUnit.equals("mm")) {
            meters = inValue / 1000d;
        }
        else if (inUnit.equals("cm")) {
            meters = inValue / 100d;
        }
        else if (inUnit.equals("mi")) {
            meters = inValue / 0.000621371192;
        }
        else if (inUnit.equals("in")) {
            meters = inValue / 39.3700787;
        }
        else if (inUnit.equals("km")) {
            meters = inValue / 0.001;
        }
        else if (inUnit.equals("ft")) {
            meters = inValue / 3.2808399;
        }
        else if (inUnit.equals("yd")) {
            meters = inValue / 1.0936133;
        }
        else {
            meters = inValue;
        }

        if (outUnit.equals("mm")) {
            outValue = new BigDecimal(meters * 1000d);
        }
        else if (outUnit.equals("cm")) {
            outValue = new BigDecimal(meters * 100d);
        }
        else if (outUnit.equals("mi")) {
            outValue = new BigDecimal(meters * 0.000621371192);
        }
        else if (outUnit.equals("in")) {
            outValue = new BigDecimal(meters * 39.3700787);
        }
        else if (outUnit.equals("km")) {
            outValue = new BigDecimal(meters * 0.001);
        }
        else if (outUnit.equals("ft")) {
            outValue = new BigDecimal(meters * 3.2808399);
        }
        else if (outUnit.equals("yd")) {
            outValue = new BigDecimal(meters * 1.0936133);
        }
        else {
            outValue = new BigDecimal(meters);
        }
        System.out.printf("%f %s", outValue, outUnit);
    }
}