+118608 If you mean
$${\mathtt{h}}{\mathtt{\,\times\,}}{\mathtt{7}}{\mathtt{\,\times\,}}{\mathtt{4}} = {\mathtt{28}} \Rightarrow {\mathtt{h}} = {\mathtt{1}}$$
But if you mean
$$\\h^7*4=28\\\\
h^7=7\\\\
h=\sqrt[7]{7}\\\\
$which can also be written as $\\\\
h=7^{1/7}\\\\
$which is approximately equal to$$$
$${{\mathtt{7}}}^{\left({\frac{{\mathtt{1}}}{{\mathtt{7}}}}\right)} = {\mathtt{1.320\: \!469\: \!247\: \!756\: \!123\: \!7}}$$
+118608 If you mean
$${\mathtt{h}}{\mathtt{\,\times\,}}{\mathtt{7}}{\mathtt{\,\times\,}}{\mathtt{4}} = {\mathtt{28}} \Rightarrow {\mathtt{h}} = {\mathtt{1}}$$
But if you mean
$$\\h^7*4=28\\\\
h^7=7\\\\
h=\sqrt[7]{7}\\\\
$which can also be written as $\\\\
h=7^{1/7}\\\\
$which is approximately equal to$$$
$${{\mathtt{7}}}^{\left({\frac{{\mathtt{1}}}{{\mathtt{7}}}}\right)} = {\mathtt{1.320\: \!469\: \!247\: \!756\: \!123\: \!7}}$$
