She has only one third of 14 1/3. To find how much gas, you could either multiply by 1/3 or divide by 3.
Let's turn 14 1/3 into an improper fraction.
43/3
Let's divide.
[tex] \frac{43}{3} /3= \frac{43}{3} * \frac{1}{3} = \frac{43}{9} =4 \frac{7}{9} [/tex]
So, there's 4 7/9 gallons.