I'm trying to build a graphic illustration of how a binary multiplication is solved, but I'm facing some problems while trying to align the cells of the array. Here's the code:
\begin{array}{rrrrrr}
&&1&1&0 & * \\
&&&1&1 & = \\
\end{array}\newline
\rule{0.25\textwidth}{0.4pt}\\
\begin{array}{rrrrrr}
&&1&1&0 & \\
&1&1&0&- & \\
\end{array}\newline
\rule{0.25\textwidth}{0.4pt}\\
\begin{array}{rrrrrr}
1&0&0&1&0_2 \\
\end{array}\newline