A solid rectangular piece of iron measures $6 \mathrm{m}$ by $6 \mathrm{cm}$ by $2 \mathrm{cm}$. Find the weight of this piece in $\mathrm{kg}$, if $1 {\mathrm{cm}}^3$ of iron weighs $8 \mathrm{gm}$.

If $1 {\mathrm{m}}^3=$ ${10}^a {\mathrm{cm}}^3$, then the value of $a=$ _____.

Fill in the blank to make the statement true:

$1$ Litre $=$_____ cubic decimeter

The volume of a cube of the side $8 \mathrm{cm}$ is _____ ${\mathrm{cm}}^3$.

The volume of a wooden cuboid of length $10 \mathrm{cm}$ and breadth $8 \mathrm{cm}$ is $4000 {\mathrm{cm}}^3$. The height of the cuboid is _____ $\mathrm{cm}$.

If $1 \mathrm{cu}.\mathrm{dm}=$${10}^a \mathrm{cu}.\mathrm{mm}$, then the value of $a=$ _____.

If $1 \mathrm{cu}. \mathrm{km}=$ ${10}^a \mathrm{cu}. \mathrm{m}$, then the value of $a=$ _____.

If $1 \mathrm{Litre}$$=$ ${10}^a \mathrm{cu}. \mathrm{cm}$, then the value of $a=$ _____.