a) $A=\underbrace{333...3}_{2014c/s}.\underbrace{999...9}_{2014c/s}=\underbrace{333...3}_{2014c/s}.\left( 1\underbrace{000...0}_{2014c/s}-1 \right)=\underbrace{333...3}_{2014c/s}\underbrace{000...0}_{2014c/s}-\underbrace{333...3}_{2014c/s}=\underbrace{333...3}_{2013c/s}2\underbrace{666...6}_{2013c/s}7$
b) \[\begin{align}
& B=\underbrace{333...3}_{2014c/s}.\underbrace{333...3}_{2014c/s}=\underbrace{111...1}_{2014c/s}.\underbrace{999...9}_{2014c/s}=\underbrace{111...1}_{2014c/s}\left( 1\underbrace{000...0}_{2014c/s}-1 \right) \\
& =\underbrace{111...1}_{2014c/s}\underbrace{000...0}_{2014c/s}-\underbrace{111...1}_{2014c/s}=\underbrace{111...1}_{2013c/s}0\underbrace{888...8}_{2013c/s}9 \\
\end{align}\]
c) \[\begin{align}
& C=\underbrace{333...3}_{2014c/s}.\underbrace{666...6}_{2014c/s}=\underbrace{999...9}_{2014c/s}.\underbrace{222...2}_{2014c/s}=\underbrace{222...2}_{2014c/s}\left( 1\underbrace{000...0}_{2014c/s}-1 \right) \\
& =\underbrace{222...2}_{2014c/s}\underbrace{000...0}_{2014c/s}-\underbrace{222...2}_{2014c/s}=\underbrace{222...2}_{2013c/s}1\underbrace{777...7}_{2013c/s}8 \\
\end{align}\]
d) \[\begin{align}
& D=\underbrace{666...6}_{2014c/s}.\underbrace{666...6}_{2014c/s}=\underbrace{222...2}_{2014c/s}.3.\underbrace{333...3}_{2014c/s}.2=\underbrace{444...4}_{2014c/s}.\underbrace{999...9}_{2014c/s} \\
& =\underbrace{444...4}_{2014c/s}.\left( 1\underbrace{000...0}_{2014c/s}-1 \right)=\underbrace{444...4}_{2014c/s}\underbrace{000...0}_{2014c/s}-\underbrace{444...4}_{2014c/s}=\underbrace{444...4}_{2013c/s}3\underbrace{555...5}_{2013c/s}6 \\
\end{align}\]