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

            double size = input.nextDouble();
            String sourceMetric = input.next().toLowerCase();
            String destinationMetric = input.next().toLowerCase();

            if (sourceMetric.equals("km")) size = size / 0.001;
            if (sourceMetric.equals("mm")) size = size / 1000;
            if (sourceMetric.equals("cm")) size = size / 100;
            if (sourceMetric.equals("mi")) size = size / 0.000621371192;
            if (sourceMetric.equals("in")) size = size / 39.3700787;
            if (sourceMetric.equals("ft")) size = size / 3.2808399;
            if (sourceMetric.equals("yd")) size = size / 1.0936133;
            if (destinationMetric.equals("km")) size = size * 0.001;
            if (destinationMetric.equals("mm")) size = size * 1000;
            if (destinationMetric.equals("cm")) size = size * 100;
            if (destinationMetric.equals("mi")) size = size * 0.000621371192;
            if (destinationMetric.equals("in")) size = size * 39.3700787;
            if (destinationMetric.equals("ft")) size = size * 3.2808399;
            if (destinationMetric.equals("yd")) size = size * 1.0936133;

            System.out.printf("%f %s", size, destinationMetric);