§ Задание 271
\[\boxed{\text{4.\ 271}}\]
\[- 54a:\]
\[- 54 \cdot 0 = 0;\]
\[- 54 \cdot 1 = - 54;\]
\[- 54 \cdot ( - 1) = 54;\]
\[- 54 \cdot 4 = - 216;\]
\[- 54 \cdot 10 = - 540;\]
\[- 54 \cdot ( - 40) = 2160.\]
\[\boxed{\text{4.\ 271}}\]
\[- 54a:\]
\[- 54 \cdot 0 = 0;\]
\[- 54 \cdot 1 = - 54;\]
\[- 54 \cdot ( - 1) = 54;\]
\[- 54 \cdot 4 = - 216;\]
\[- 54 \cdot 10 = - 540;\]
\[- 54 \cdot ( - 40) = 2160.\]