\[\boxed{\text{999\ (999).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[14,3 \leq a \leq 14,4\]
\[25,1 \leq b \leq 25,2\]
\[P = (a + b) \cdot 2 = 2a + 2b,\]
\[28,6 \leq 2a \leq 28,8\]
\[30,2 \leq 2b \leq 50,4\]
\[58,8 \leq P \leq 79,2.\]
\[S = ab,\]
\[358,93 \leq S \leq 362,88.\]