code: public static NumberBinding divideSafe(ObservableValue<Number> dividend, ObservableValue<Number> divisor) {
          return divideSafe(dividend, divisor, new SimpleDoubleProperty(0));
      }
docs: An number binding of a division that won't throw an {@link java.lang.ArithmeticException}
  when a division by zero happens. See {@link #divideSafe(javafx.beans.value.ObservableIntegerValue,
  javafx.beans.value.ObservableIntegerValue)}
  for more informations.
  
  @param dividend     the observable value used as dividend
  @param divisor      the observable value used as divisor
  @return the resulting number binding