what is 15x8x7 1/2

$${\mathtt{15}}{\mathtt{\,\times\,}}{\mathtt{8}}{\mathtt{\,\times\,}}\left({\mathtt{7}}{\mathtt{\,\small\textbf+\,}}{\frac{{\mathtt{1}}}{{\mathtt{2}}}}\right) = {\mathtt{900}}$$

$${\mathtt{15}}{\mathtt{\,\times\,}}{\mathtt{8}}{\mathtt{\,\times\,}}{\mathtt{7.5}} = {\mathtt{900}}$$