package java3;
public class met{
      public static int output1;
      public static void fn(String ip1,
String ip2, int ip3) {
            int a =
ip1.length() - 5;
            String
old_reading = ip1.substring(a, ip1.length());
            String
cur_reading = ip2.substring(a, ip1.length());
            if
(ip1.substring(0, a).equals(ip2.substring(0, a))) {
                  int value =
Integer.parseInt(cur_reading)
                              -
Integer.parseInt(old_reading);
                  output1 = value * ip3;
            }
      }
      public static void main(String[]
args) {
            fn("ABC2012345", "ABC2012660", 4);
            System.out.println(output1);
      }
}