Simplify : $$\frac{{343 \times 49}}{{216 \times 16 \times 81}} = ?$$

• A. $\frac{{{7^5}}}{{{6^7}}}$$
• B. $\frac{{{7^5}}}{{{6^8}}}$$
• C. $\frac{{{7^6}}}{{{6^7}}}$$
• D. $\frac{{{7^4}}}{{{6^8}}}$$
• E. one of these