7,17-9,81:3

Interpret as 7.17 − 9.81 ÷ 3 (decimal point style; colon means division, comma is decimal separator).

• 9.81 ÷ 3 = 3.27
• 7.17 − 3.27 = 3.90

Answer: 3.90 (or 3,90 in decimal-comma notation).