\[\boxed{\mathbf{32.}}\]
\[1)\ 7 \cdot 4 = 28\]
\[8 \cdot 4 = 32\]
\[9 \cdot 4 = 36\]
\[2)\ 9 \cdot 5 = 45\]
\[7 \cdot 5 = 35\]
\[8 \cdot 5 = 40\]
\[3)\ 8 \cdot 6 = 48\]
\[9 \cdot 6 = 54\]
\[7 \cdot 6 = 42\]