FFO / Net debt is typically estimated as:

**FFO / Net debt = Funds From Operations / Net financial debt**

Using the provided 2022 cash-flow facts, a practical estimate of **FFO** is operating cash flow before working-capital movements. From the cash-flow statement:

- Cash flows from operations in 2022: **548,169,000**
- Increase/decrease in working capital in 2022: **-336,750,000**

So:

**FFO ≈ CFO − working capital effect**  
= 548,169,000 − (-336,750,000)  
= **884,919,000**

Next, estimate **net debt** at 2022 year-end using financial liabilities minus cash and current financial assets:

Financial liabilities:
- Short-term financial liabilities excluding other current financial liabilities: **142,437,000**
- Other current financial liabilities: **290,000**
- Long-term financial liabilities excluding other non-current financial liabilities: **6,402,913,000**
- Other noncurrent financial liabilities: **34,000**

Gross financial debt:
= 142,437,000 + 290,000 + 6,402,913,000 + 34,000  
= **6,545,674,000**

Deduct liquid financial assets:
- Cash and cash equivalents: **451,946,000**
- Current financial assets excluding other current financial assets: **5,770,000**
- Other current financial assets: **17,455,000**

Net debt:
= 6,545,674,000 − 451,946,000 − 5,770,000 − 17,455,000  
= **6,070,503,000**

Therefore:

**FFO / Net debt = 884,919,000 / 6,070,503,000 = 0.1458**, or about **14.6%**.

<answer>0.146</answer>