Let’s reason this out step-by-step.

**1. Estimate FFO (Funds From Operations) for 2022**  
FFO is commonly estimated as:  

\[
\text{FFO} = \text{Profit Loss from Operating Activities} + \text{Depreciation, Amortization & Provisions} - \text{Taxes} - \text{Finance Costs} + \text{Finance Income}
\]

From the data:  
- Profit Loss From Operating Activities (2022): **533,800,000 EUR**  
- Amortisation Depreciation And Provisions (2022): **667,100,000 EUR**  
- Income Tax Expense (2022): **103,500,000 EUR**  
- Finance Costs (2022): **217,200,000 EUR**  
- Finance Income (2022): **82,200,000 EUR**  

So:

\[
\text{FFO} = 533.8M + 667.1M - 103.5M - 217.2M + 82.2M
\]
\[
\text{FFO} = 962.4M \ \text{EUR}
\]

---

**2. Estimate Net Debt for 2022**  
Net debt = Noncurrent Financial Liabilities + Current Financial Liabilities - Cash and Cash Equivalents  

At 2023-01-01:  
- Noncurrent Financial Liabilities: **5,689,900,000 EUR**  
- Current Financial Liabilities: **650,100,000 EUR**  
- Cash and Cash Equivalents: **1,942,400,000 EUR**  

\[
\text{Net Debt} = 5,689.9M + 650.1M - 1,942.4M
\]
\[
\text{Net Debt} = 4,397.6M \ \text{EUR}
\]

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**3. FFO / Net Debt**  
\[
\frac{962.4}{4,397.6} \approx 0.2188
\]

---

<answer>0.219</answer>