Metric Convertor

import java.util.Scanner;

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

        double input = Double.parseDouble(scanner.nextLine());
        String inputmetric = scanner.nextLine();
        String outputmetric = scanner.nextLine();

        double number = 1;

        if (inputmetric.equals("m")){
            number = input;
        }else if (inputmetric.equals("mm")){
            number = input/1000;
        }else if (inputmetric.equals("km")){
            number = input/0.001;
        }else if (inputmetric.equals("cm")){
            number = input/100;
        } else if (inputmetric.equals("mi")){
            number = input/0.000621371192;
        }else if (inputmetric.equals("in")){
            number = input/39.3700787;
        }else if (inputmetric.equals("ft")){
            number = input/3.2808399;
        }else if (inputmetric.equals("yd")){
            number = input/1.0936133;
        }
        if (outputmetric.equals("m")){
            input = number;
        }else if (outputmetric.equals("mm")){
            number = number*1000;
        }else if (outputmetric.equals("km")){
            number = number*0.001;
        }else if (outputmetric.equals("cm")){
            number = number*100;
        } else if (outputmetric.equals("mi")){
            number = number*0.000621371192;
        }else if (outputmetric.equals("in")){
            number = number*39.3700787;
        }else if (outputmetric.equals("ft")){
            number = number*3.2808399;
        }else if (outputmetric.equals("yd")){
            number = number*1.0936133;
        }
        System.out.printf("%.8f %s", number,outputmetric);
    }
}