[tex]\sf 400\cdot 12=4800\\\\\\\sf \frac{\begin{matrix}\space\space&\space\space&\sf 4&\sf 0&\sf 0\\ \space\space&\times \:&\space\space&\sf 1&\sf 2\end{matrix}}{\begin{matrix}\space\space&\sf 0&\sf 8&\sf 0&\sf 0\\ \space\space&\sf 4&\sf 0&\sf 0&\sf 0\end{matrix}}\\\\\\\sf 800+4000=4800\\\\\\\tt Agora \ Divide \ Por \ 100\\\\\\\sf 4800|100\\\\\sf =48 \iff \ Desconto\\\\\\\sf 400-48\to \boxed{\sf =R\$352,00}\\\\\\\bullet[/tex]
