Multiply $78847$ by $8803$.

Multiply $659477$ by $5408$.

Divide $13443003$ by $567$. 

Divide $23890764$ by $1985$.

$12$ drums of milk have $84 \mathrm{litres}$ of milk in them. Find the capacity of one drum in $\mathrm{millilitres}$.

The Delhi Development Authority built $63,85,196$ flats in $2015$ and $23,48,967$ flats in $2016$. How many flats in all were built in the two years?

The number of candidates appearing for class $\mathrm{X}$ board examination conducted by CBSE was $14,58,937$ in $2009$; $16,93,487$ in $2010$; $24,13,468$ in $2011$; and $40,05,093$  in $2012$. Find the total number of candidates who appeared for the examination in these four years.