b=0;

k=0;

m=0;

g=0;

switch (Unit)

{

   case "byte":

      b=input;

      k=b/1024.0;

      m=k/1024.0;

      g=m/1024.0;

      break;

   case "kilobyte [KB]":

      b=input*1024;

      k=input;

      m=k/1024.0;

      g=m/1024.0;

      break;

   case "megabyte [MB]":

      b=input*1024*1024;

      k=input*1024;

      m=input;

      g=m/1024.0;  

      break; 

   case "gigabyte [GB]":

      b=input*1024*1024*1024;

      k=input*1024*1024;

      m=input*1024;

      g=input;  

      break; 

}