\[\boxed{\text{78.}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[24\ :(3 \cdot 4) = 24\ :12 = 2.\]
\[24\ :(3 \cdot 4 = (24\ :3)\ :4 =\]
\[= 8\ :4 = 2.\]
\[24\ :(3 \cdot 4) = (24\ :4)\ :3 =\]
\[= 6\ :3 = 2.\]
\[32\ :(2 \cdot 4) = 32\ :8 = 4.\]
\[32\ :(2 \cdot 4) = (32\ :2)\ :4 =\]
\[= 16\ :4 = 4.\]
\[32\ :(2 \cdot 4) = (32\ :4)\ :2 =\]
\[= 8\ :2 = 4.\ \]