Binary

$\hspace{1cm} 6 \hspace{1cm}6 \hspace{1cm} 7 \hspace{1cm} 3$

$\hspace{.8cm} 110 \hspace{.6cm} 110 \hspace{.6cm} 111 \hspace{.6cm} 011$

binary form:

$\hspace{.8cm} \underbrace{1101} \underbrace{10 11} \underbrace{1011}$

$\hspace{1cm}13 \hspace{.5cm}11 \hspace{.5cm}11$

$\hspace{1.1cm} \downarrow \hspace{.7cm} \downarrow \hspace{.7cm} \downarrow$

$\hspace{1.1cm} D \hspace{.5cm} B \hspace{.5cm} B$

$(6673)_{8} = (DBB)_{16}$

Decimal

$(6673)_{8}$

$= 6*3^8 + 6* 8^2 + 7 *8^1 + 3*8^0$

$= 6*512+6*64+56+3$

$=3072+384+56+3$

$=3515$

$(6673)_{8} = (3515)_{10}$