private static BigDecimal daysPlusSeconds(BigInteger days,BigDecimal seconds){
  return seconds.add(new BigDecimal(days.multiply(BigInteger.valueOf(24 * 60 * 60))));
}

private static BigDecimal daysPlusSeconds ( BigInteger days , BigDecimal seconds ) { return seconds . add ( new BigDecimal ( days . multiply ( BigInteger . valueOf ( 24 * 60 * 60 ) ) ) ) ; }
returns the total number of seconds from a specified number of days and seconds .
