Solve Write a Mixed Numeral for the Answer $\frac{1}{3}$ Foot Square Tiles Along A

Solve. Write a mixed numeral for the answer.
-The floor of a rectangular room is to be tiled with $\frac{1}{3}$ foot square tiles along a $6 \frac{7}{8}$ foot wall. How many tiles will be needed along the wall?

A) $20 \frac{5}{8}$ tiles
B) $2 \frac{7}{24}$ tiles
C) $18 \frac{7}{8}$ tiles
D) 25 tiles