\[a = 5,62 \approx 5,6;\ \ \ \ \ \]
\[b = 2,(5) \approx 2,6\]
\[a \cdot b = 5,6 \cdot 2,6 \approx 15\]
\[a\ :b = 5,6\ :2,6 = 56\ :26 \approx 2,2.\]