\[\boxed{\text{294\ (294).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.

Решение.
\[231 \cdot 4 = 924\]

\[304 \cdot 3 = 912\]
\[129 \cdot 6 = 774\]

\[984\ :8 = 123\]

\[938\ :7 = 134\]

\[876\ :4 = 219\]

\[752\ :^{1}2 -^{4}540\ :^{2}9 -^{5}48 \cdot^{3}6 =\]
\[= 28\]

\[\left( 608 +^{1}206 \right)\ :^{2}2 -^{3}100 = 307\]

\[964{\ :}^{1}4 \cdot^{2}3 -^{4}810\ :^{3}3 =\]
\[= 723 - 270 = 453\]
