2+2/31=2,0645

You’re right if you’re rounding to four decimals.

• Exact value: 2 + 2/31 = 64/31 ≈ 2.064516129...
• Rounded to four decimals: 2.0645 (or 2,0645 in some locales)

Note: if you meant (2+2)/31, that would be 4/31 ≈ 0.1290, which is a different result.