of 3 feet - 3 inches 12 inches 12 feet 1 inch 1 foot

To calculate this, we will need to convert the 3 feet to inches
Mathematically;
1 feet = 12 inches
Thus, the number of inches in 3 feet will be;
[tex]3\text{ }\times12\text{ = 36 inches}[/tex]Then, we can proceed to find 1/3 of this
That would be;
[tex]\frac{1}{3}\times\text{ 36 = 12 inches}[/tex]