what is 729 over 12 times itself two more times equal?

Umm I am not sure what you mean :/

maybe.......

$$\frac{729}{12}*x*x = \frac{729x^2}{12}$$

$${\frac{{\mathtt{729}}}{{\mathtt{12}}}} = {\frac{{\mathtt{243}}}{{\mathtt{4}}}} = {\mathtt{60.75}}$$

$${{\mathtt{60.75}}}^{{\mathtt{3}}} = {\mathtt{224\,201.671\: \!875}}$$

answer: 224, 201.671, 875