176.4=1/2(9.81xt) x t2

$${\mathtt{176.4}} = {\frac{{\mathtt{1}}}{{\mathtt{2}}}}{\mathtt{\,\times\,}}\left({\mathtt{9.81}}{\mathtt{\,\times\,}}{\mathtt{xt}}\right){\mathtt{\,\times\,}}{\mathtt{x}}{\mathtt{\,\times\,}}{{\mathtt{t}}}^{{\mathtt{2}}} \Rightarrow {\mathtt{xt}} = {\frac{{\mathtt{3\,920}}}{\left({\mathtt{109}}{\mathtt{\,\times\,}}{{\mathtt{t}}}^{{\mathtt{2}}}{\mathtt{\,\times\,}}{\mathtt{x}}\right)}}$$

.