Analyze the financial performance of Saudi Aramco for the year 2023 using financial ratios. Given that Saudi Aramco reported total assets of SAR 500,000,000, total liabilities of SAR 200,000,000, and net income of SAR 100,000,000, calculate the debt-to-equity ratio and the return on assets (ROA) ratio. Interpret the results and provide insights into Saudi Aramco's financial leverage and profitability.