pyramid has a rectangle base that is 16 meters long and 21 meters wide. The height of the pyramid is 15 meters. the volume of the pyramid

The formula for the volume of a pyramid is $${\mathtt{V}} = {\frac{{\mathtt{1}}}{{\mathtt{3}}}}{\mathtt{\,\times\,}}{\mathtt{base}}{\mathtt{\,\times\,}}{\mathtt{height}}$$

so $${\mathtt{V}} = {\frac{{\mathtt{1}}}{{\mathtt{3}}}}{\mathtt{\,\times\,}}\left({\mathtt{16}}{\mathtt{\,\times\,}}{\mathtt{21}}\right){\mathtt{\,\times\,}}{\mathtt{15}}$$         (The brackets aren't needed I just wanted to separate the base)