12 in=1 foot
Just multiply 1.3 by 12. I think...
$${\mathtt{1.3}}{\mathtt{\,\times\,}}{\mathtt{12}} = {\frac{{\mathtt{78}}}{{\mathtt{5}}}} = {\mathtt{15.6}}$$
I'm pretty sure that is correct, but I'm not very bright. I always make careless mistakes. 😁
how many inches is 1.3 feet = 15.6[in]
see http://web2.0calc.com/#1.3[ft] to [in] and push the "=" Button