public static double calcDecimal(int exponent, int position)  {
        // Base case
        char currentBit = input.charAt(position);
        if (exponent == 0) {
            if (currentBit == '1') {
                return 1;
            } else {
                return 0;
            }
        } else {
            if (currentBit == '1') {
                return Math.pow(2, exponent) + Main.calcDecimal(--exponent, ++position);
            } else {
                return Main.calcDecimal(--exponent, ++position);
            }
        }