int remainder = (int) (numerator - (long) quotient * scale);
      selectInPlace(quotient, dataset, 0, dataset.length - 1);
      if (remainder == 0) {
        return dataset[quotient];
      } else {
        selectInPlace(quotient + 1, dataset, quotient + 1, dataset.length - 1);
        return interpolate(dataset[quotient], dataset[quotient + 1], remainder, scale);