To estimate **FFO / Net debt** for 2022:

1. **Funds from operations (FFO)** can be approximated from cash flow data as operating cash flow before working-capital movements:
   - Cash flows from operating activities = **€4,242m**
   - Increase/decrease in working capital = **-€272m**

   Since operating cash flow includes the working-capital decrease, estimated FFO is:

   \[
   \text{FFO} = 4{,}242 - (-272) = 4{,}514 \text{ million EUR}
   \]

2. **Net debt** can be estimated as financial liabilities minus cash and cash equivalents. Include current and non-current financial liabilities:
   - Noncurrent financial liabilities = **€13,999m**
   - Current financial liabilities = **€2,302m**
   - Cash and cash equivalents = **€3,985m**

   \[
   \text{Net debt} = 13{,}999 + 2{,}302 - 3{,}985 = 12{,}316 \text{ million EUR}
   \]

3. **FFO / Net debt ratio**:

   \[
   \frac{4{,}514}{12{,}316} = 0.3665 \approx 36.7\%
   \]

<answer>36.7%</answer>